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dsdb/password_hash: make sure that io->n.cleartext_utf8.data is a null terminated...
[Samba/gebeck_regimport.git] / source4 / dsdb / samdb / ldb_modules / password_hash.c
blob6b8cd9cd15776739eb4fbba9a5e958d55d53a1d5
1 /*
2 ldb database module
3
4 Copyright (C) Simo Sorce 2004-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
6 Copyright (C) Andrew Tridgell 2004
7 Copyright (C) Stefan Metzmacher 2007-2010
8 Copyright (C) Matthias Dieter Wallnöfer 2009-2010
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 /*
25 * Name: ldb
26 *
27 * Component: ldb password_hash module
28 *
29 * Description: correctly handle AD password changes fields
30 *
31 * Author: Andrew Bartlett
32 * Author: Stefan Metzmacher
33 */
34
35 #include "includes.h"
36 #include "ldb_module.h"
37 #include "libcli/auth/libcli_auth.h"
38 #include "system/kerberos.h"
39 #include "auth/kerberos/kerberos.h"
40 #include "dsdb/samdb/samdb.h"
41 #include "dsdb/samdb/ldb_modules/util.h"
42 #include "dsdb/samdb/ldb_modules/password_modules.h"
43 #include "librpc/gen_ndr/ndr_drsblobs.h"
44 #include "../lib/crypto/crypto.h"
45 #include "param/param.h"
46
47 /* If we have decided there is a reason to work on this request, then
48 * setup all the password hash types correctly.
49 *
50 * If we haven't the hashes yet but the password given as plain-text (attributes
51 * 'unicodePwd', 'userPassword' and 'clearTextPassword') we have to check for
52 * the constraints. Once this is done, we calculate the password hashes.
53 *
54 * Notice: unlike the real AD which only supports the UTF16 special based
55 * 'unicodePwd' and the UTF8 based 'userPassword' plaintext attribute we
56 * understand also a UTF16 based 'clearTextPassword' one.
57 * The latter is also accessible through LDAP so it can also be set by external
58 * tools and scripts. But be aware that this isn't portable on non SAMBA 4 ADs!
59 *
60 * Also when the module receives only the password hashes (possible through
61 * specifying an internal LDB control - for security reasons) some checks are
62 * performed depending on the operation mode (see below) (e.g. if the password
63 * has been in use before if the password memory policy was activated).
64 *
65 * Attention: There is a difference between "modify" and "reset" operations
66 * (see MS-ADTS 3.1.1.3.1.5). If the client sends a "add" and "remove"
67 * operation for a password attribute we thread this as a "modify"; if it sends
68 * only a "replace" one we have an (administrative) reset.
69 *
70 * Finally, if the administrator has requested that a password history
71 * be maintained, then this should also be written out.
72 *
73 */
74
75 /* TODO: [consider always MS-ADTS 3.1.1.3.1.5]
76 * - Check for right connection encryption
77 */
78
79 /* Notice: Definition of "dsdb_control_password_change_status" moved into
80 * "samdb.h" */
81
82 struct ph_context {
83 struct ldb_module *module;
84 struct ldb_request *req;
85
86 struct ldb_request *dom_req;
87 struct ldb_reply *dom_res;
88
89 struct ldb_reply *search_res;
90
91 struct dsdb_control_password_change_status *status;
92 struct dsdb_control_password_change *change;
93
94 bool pwd_reset;
95 bool change_status;
96 bool hash_values;
97 bool userPassword;
98 bool pwd_last_set_bypass;
99 };
100
101
102 struct setup_password_fields_io {
103 struct ph_context *ac;
104
105 struct smb_krb5_context *smb_krb5_context;
106
107 /* infos about the user account */
108 struct {
109 uint32_t userAccountControl;
110 NTTIME pwdLastSet;
111 const char *sAMAccountName;
112 const char *user_principal_name;
113 bool is_computer;
114 uint32_t restrictions;
115 } u;
116
117 /* new credentials and old given credentials */
118 struct setup_password_fields_given {
119 const struct ldb_val *cleartext_utf8;
120 const struct ldb_val *cleartext_utf16;
121 struct samr_Password *nt_hash;
122 struct samr_Password *lm_hash;
123 } n, og;
124
125 /* old credentials */
126 struct {
127 struct samr_Password *nt_hash;
128 struct samr_Password *lm_hash;
129 uint32_t nt_history_len;
130 struct samr_Password *nt_history;
131 uint32_t lm_history_len;
132 struct samr_Password *lm_history;
133 const struct ldb_val *supplemental;
134 struct supplementalCredentialsBlob scb;
135 } o;
136
137 /* generated credentials */
138 struct {
139 struct samr_Password *nt_hash;
140 struct samr_Password *lm_hash;
141 uint32_t nt_history_len;
142 struct samr_Password *nt_history;
143 uint32_t lm_history_len;
144 struct samr_Password *lm_history;
145 const char *salt;
146 DATA_BLOB aes_256;
147 DATA_BLOB aes_128;
148 DATA_BLOB des_md5;
149 DATA_BLOB des_crc;
150 struct ldb_val supplemental;
151 NTTIME last_set;
152 } g;
153 };
154
155 static int password_hash_bypass(struct ldb_module *module, struct ldb_request *request)
156 {
157 struct ldb_context *ldb = ldb_module_get_ctx(module);
158 const struct ldb_message *msg;
159 struct ldb_message_element *nte;
160 struct ldb_message_element *lme;
161 struct ldb_message_element *nthe;
162 struct ldb_message_element *lmhe;
163 struct ldb_message_element *sce;
164
165 switch (request->operation) {
166 case LDB_ADD:
167 msg = request->op.add.message;
168 break;
169 case LDB_MODIFY:
170 msg = request->op.mod.message;
171 break;
172 default:
173 return ldb_next_request(module, request);
174 }
175
176 /* nobody must touch password histories and 'supplementalCredentials' */
177 nte = dsdb_get_single_valued_attr(msg, "unicodePwd",
178 request->operation);
179 lme = dsdb_get_single_valued_attr(msg, "dBCSPwd",
180 request->operation);
181 nthe = dsdb_get_single_valued_attr(msg, "ntPwdHistory",
182 request->operation);
183 lmhe = dsdb_get_single_valued_attr(msg, "lmPwdHistory",
184 request->operation);
185 sce = dsdb_get_single_valued_attr(msg, "supplementalCredentials",
186 request->operation);
187
188 #define CHECK_HASH_ELEMENT(e, min, max) do {\
189 if (e && e->num_values) { \
190 unsigned int _count; \
191 if (e->num_values != 1) { \
192 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
193 "num_values != 1"); \
194 } \
195 if ((e->values[0].length % 16) != 0) { \
196 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
197 "length % 16 != 0"); \
198 } \
199 _count = e->values[0].length / 16; \
200 if (_count < min) { \
201 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
202 "count < min"); \
203 } \
204 if (_count > max) { \
205 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
206 "count > max"); \
207 } \
208 } \
209 } while (0)
210
211 CHECK_HASH_ELEMENT(nte, 1, 1);
212 CHECK_HASH_ELEMENT(lme, 1, 1);
213 CHECK_HASH_ELEMENT(nthe, 1, INT32_MAX);
214 CHECK_HASH_ELEMENT(lmhe, 1, INT32_MAX);
215
216 if (sce && sce->num_values) {
217 enum ndr_err_code ndr_err;
218 struct supplementalCredentialsBlob *scb;
219 struct supplementalCredentialsPackage *scpp = NULL;
220 struct supplementalCredentialsPackage *scpk = NULL;
221 struct supplementalCredentialsPackage *scpkn = NULL;
222 struct supplementalCredentialsPackage *scpct = NULL;
223 DATA_BLOB scpbp = data_blob_null;
224 DATA_BLOB scpbk = data_blob_null;
225 DATA_BLOB scpbkn = data_blob_null;
226 DATA_BLOB scpbct = data_blob_null;
227 DATA_BLOB blob;
228 uint32_t i;
229
230 if (sce->num_values != 1) {
231 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
232 "num_values != 1");
233 }
234
235 scb = talloc_zero(request, struct supplementalCredentialsBlob);
236 if (!scb) {
237 return ldb_module_oom(module);
238 }
239
240 ndr_err = ndr_pull_struct_blob_all(&sce->values[0], scb, scb,
241 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
242 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
243 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
244 "ndr_pull_struct_blob_all");
245 }
246
247 if (scb->sub.num_packages < 2) {
248 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
249 "num_packages < 2");
250 }
251
252 for (i=0; i < scb->sub.num_packages; i++) {
253 DATA_BLOB subblob;
254
255 subblob = strhex_to_data_blob(scb, scb->sub.packages[i].data);
256 if (subblob.data == NULL) {
257 return ldb_module_oom(module);
258 }
259
260 if (strcmp(scb->sub.packages[i].name, "Packages") == 0) {
261 if (scpp) {
262 return ldb_error(ldb,
263 LDB_ERR_CONSTRAINT_VIOLATION,
264 "Packages twice");
265 }
266 scpp = &scb->sub.packages[i];
267 scpbp = subblob;
268 continue;
269 }
270 if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos") == 0) {
271 if (scpk) {
272 return ldb_error(ldb,
273 LDB_ERR_CONSTRAINT_VIOLATION,
274 "Primary:Kerberos twice");
275 }
276 scpk = &scb->sub.packages[i];
277 scpbk = subblob;
278 continue;
279 }
280 if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos-Newer-Keys") == 0) {
281 if (scpkn) {
282 return ldb_error(ldb,
283 LDB_ERR_CONSTRAINT_VIOLATION,
284 "Primary:Kerberos-Newer-Keys twice");
285 }
286 scpkn = &scb->sub.packages[i];
287 scpbkn = subblob;
288 continue;
289 }
290 if (strcmp(scb->sub.packages[i].name, "Primary:CLEARTEXT") == 0) {
291 if (scpct) {
292 return ldb_error(ldb,
293 LDB_ERR_CONSTRAINT_VIOLATION,
294 "Primary:CLEARTEXT twice");
295 }
296 scpct = &scb->sub.packages[i];
297 scpbct = subblob;
298 continue;
299 }
300
301 data_blob_free(&subblob);
302 }
303
304 if (scpp == NULL) {
305 return ldb_error(ldb,
306 LDB_ERR_CONSTRAINT_VIOLATION,
307 "Primary:Packages missing");
308 }
309
310 if (scpk == NULL) {
311 /*
312 * If Primary:Kerberos is missing w2k8r2 reboots
313 * when a password is changed.
314 */
315 return ldb_error(ldb,
316 LDB_ERR_CONSTRAINT_VIOLATION,
317 "Primary:Kerberos missing");
318 }
319
320 if (scpp) {
321 struct package_PackagesBlob *p;
322 uint32_t n;
323
324 p = talloc_zero(scb, struct package_PackagesBlob);
325 if (p == NULL) {
326 return ldb_module_oom(module);
327 }
328
329 ndr_err = ndr_pull_struct_blob(&scpbp, p, p,
330 (ndr_pull_flags_fn_t)ndr_pull_package_PackagesBlob);
331 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
332 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
333 "ndr_pull_struct_blob Packages");
334 }
335
336 if (p->names == NULL) {
337 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
338 "Packages names == NULL");
339 }
340
341 for (n = 0; p->names[n]; n++) {
342 /* noop */
343 }
344
345 if (scb->sub.num_packages != (n + 1)) {
346 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
347 "Packages num_packages != num_names + 1");
348 }
349
350 talloc_free(p);
351 }
352
353 if (scpk) {
354 struct package_PrimaryKerberosBlob *k;
355
356 k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
357 if (k == NULL) {
358 return ldb_module_oom(module);
359 }
360
361 ndr_err = ndr_pull_struct_blob(&scpbk, k, k,
362 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
363 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
364 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
365 "ndr_pull_struct_blob PrimaryKerberos");
366 }
367
368 if (k->version != 3) {
369 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
370 "PrimaryKerberos version != 3");
371 }
372
373 if (k->ctr.ctr3.salt.string == NULL) {
374 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
375 "PrimaryKerberos salt == NULL");
376 }
377
378 if (strlen(k->ctr.ctr3.salt.string) == 0) {
379 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
380 "PrimaryKerberos strlen(salt) == 0");
381 }
382
383 if (k->ctr.ctr3.num_keys != 2) {
384 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
385 "PrimaryKerberos num_keys != 2");
386 }
387
388 if (k->ctr.ctr3.num_old_keys > k->ctr.ctr3.num_keys) {
389 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
390 "PrimaryKerberos num_old_keys > num_keys");
391 }
392
393 if (k->ctr.ctr3.keys[0].keytype != ENCTYPE_DES_CBC_MD5) {
394 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
395 "PrimaryKerberos key[0] != DES_CBC_MD5");
396 }
397 if (k->ctr.ctr3.keys[1].keytype != ENCTYPE_DES_CBC_CRC) {
398 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
399 "PrimaryKerberos key[1] != DES_CBC_CRC");
400 }
401
402 if (k->ctr.ctr3.keys[0].value_len != 8) {
403 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
404 "PrimaryKerberos key[0] value_len != 8");
405 }
406 if (k->ctr.ctr3.keys[1].value_len != 8) {
407 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
408 "PrimaryKerberos key[1] value_len != 8");
409 }
410
411 for (i = 0; i < k->ctr.ctr3.num_old_keys; i++) {
412 if (k->ctr.ctr3.old_keys[i].keytype ==
413 k->ctr.ctr3.keys[i].keytype &&
414 k->ctr.ctr3.old_keys[i].value_len ==
415 k->ctr.ctr3.keys[i].value_len) {
416 continue;
417 }
418
419 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
420 "PrimaryKerberos old_keys type/value_len doesn't match");
421 }
422
423 talloc_free(k);
424 }
425
426 if (scpkn) {
427 struct package_PrimaryKerberosBlob *k;
428
429 k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
430 if (k == NULL) {
431 return ldb_module_oom(module);
432 }
433
434 ndr_err = ndr_pull_struct_blob(&scpbkn, k, k,
435 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
436 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
437 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
438 "ndr_pull_struct_blob PrimaryKerberosNeverKeys");
439 }
440
441 if (k->version != 4) {
442 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
443 "KerberosNerverKeys version != 4");
444 }
445
446 if (k->ctr.ctr4.salt.string == NULL) {
447 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
448 "KerberosNewerKeys salt == NULL");
449 }
450
451 if (strlen(k->ctr.ctr4.salt.string) == 0) {
452 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
453 "KerberosNewerKeys strlen(salt) == 0");
454 }
455
456 if (k->ctr.ctr4.num_keys != 4) {
457 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
458 "KerberosNewerKeys num_keys != 2");
459 }
460
461 if (k->ctr.ctr4.num_old_keys > k->ctr.ctr4.num_keys) {
462 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
463 "KerberosNewerKeys num_old_keys > num_keys");
464 }
465
466 if (k->ctr.ctr4.num_older_keys > k->ctr.ctr4.num_old_keys) {
467 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
468 "KerberosNewerKeys num_older_keys > num_old_keys");
469 }
470
471 if (k->ctr.ctr4.keys[0].keytype != ENCTYPE_AES256_CTS_HMAC_SHA1_96) {
472 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
473 "KerberosNewerKeys key[0] != AES256");
474 }
475 if (k->ctr.ctr4.keys[1].keytype != ENCTYPE_AES128_CTS_HMAC_SHA1_96) {
476 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
477 "KerberosNewerKeys key[1] != AES128");
478 }
479 if (k->ctr.ctr4.keys[2].keytype != ENCTYPE_DES_CBC_MD5) {
480 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
481 "KerberosNewerKeys key[2] != DES_CBC_MD5");
482 }
483 if (k->ctr.ctr4.keys[3].keytype != ENCTYPE_DES_CBC_CRC) {
484 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
485 "KerberosNewerKeys key[3] != DES_CBC_CRC");
486 }
487
488 if (k->ctr.ctr4.keys[0].value_len != 32) {
489 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
490 "KerberosNewerKeys key[0] value_len != 32");
491 }
492 if (k->ctr.ctr4.keys[1].value_len != 16) {
493 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
494 "KerberosNewerKeys key[1] value_len != 16");
495 }
496 if (k->ctr.ctr4.keys[2].value_len != 8) {
497 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
498 "KerberosNewerKeys key[2] value_len != 8");
499 }
500 if (k->ctr.ctr4.keys[3].value_len != 8) {
501 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
502 "KerberosNewerKeys key[3] value_len != 8");
503 }
504
505 /*
506 * TODO:
507 * Maybe we can check old and older keys here.
508 * But we need to do some tests, if the old keys
509 * can be taken from the PrimaryKerberos blob
510 * (with only des keys), when the domain was upgraded
511 * from w2k3 to w2k8.
512 */
513
514 talloc_free(k);
515 }
516
517 if (scpct) {
518 struct package_PrimaryCLEARTEXTBlob *ct;
519
520 ct = talloc_zero(scb, struct package_PrimaryCLEARTEXTBlob);
521 if (ct == NULL) {
522 return ldb_module_oom(module);
523 }
524
525 ndr_err = ndr_pull_struct_blob(&scpbct, ct, ct,
526 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryCLEARTEXTBlob);
527 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
528 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
529 "ndr_pull_struct_blob PrimaryCLEARTEXT");
530 }
531
532 if ((ct->cleartext.length % 2) != 0) {
533 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
534 "PrimaryCLEARTEXT length % 2 != 0");
535 }
536
537 talloc_free(ct);
538 }
539
540 ndr_err = ndr_push_struct_blob(&blob, scb, scb,
541 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
542 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
543 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
544 "ndr_pull_struct_blob_all");
545 }
546
547 if (sce->values[0].length != blob.length) {
548 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
549 "supplementalCredentialsBlob length differ");
550 }
551
552 if (memcmp(sce->values[0].data, blob.data, blob.length) != 0) {
553 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
554 "supplementalCredentialsBlob memcmp differ");
555 }
556
557 talloc_free(scb);
558 }
559
560 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_bypass - validated\n");
561 return ldb_next_request(module, request);
562 }
563
564 /* Get the NT hash, and fill it in as an entry in the password history,
565 and specify it into io->g.nt_hash */
566
567 static int setup_nt_fields(struct setup_password_fields_io *io)
568 {
569 struct ldb_context *ldb;
570 uint32_t i;
571
572 io->g.nt_hash = io->n.nt_hash;
573 ldb = ldb_module_get_ctx(io->ac->module);
574
575 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
576 return LDB_SUCCESS;
577 }
578
579 /* We might not have an old NT password */
580 io->g.nt_history = talloc_array(io->ac,
581 struct samr_Password,
582 io->ac->status->domain_data.pwdHistoryLength);
583 if (!io->g.nt_history) {
584 return ldb_oom(ldb);
585 }
586
587 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
588 io->o.nt_history_len); i++) {
589 io->g.nt_history[i+1] = io->o.nt_history[i];
590 }
591 io->g.nt_history_len = i + 1;
592
593 if (io->g.nt_hash) {
594 io->g.nt_history[0] = *io->g.nt_hash;
595 } else {
596 /*
597 * TODO: is this correct?
598 * the simular behavior is correct for the lm history case
599 */
600 E_md4hash("", io->g.nt_history[0].hash);
601 }
602
603 return LDB_SUCCESS;
604 }
605
606 /* Get the LANMAN hash, and fill it in as an entry in the password history,
607 and specify it into io->g.lm_hash */
608
609 static int setup_lm_fields(struct setup_password_fields_io *io)
610 {
611 struct ldb_context *ldb;
612 uint32_t i;
613
614 io->g.lm_hash = io->n.lm_hash;
615 ldb = ldb_module_get_ctx(io->ac->module);
616
617 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
618 return LDB_SUCCESS;
619 }
620
621 /* We might not have an old LM password */
622 io->g.lm_history = talloc_array(io->ac,
623 struct samr_Password,
624 io->ac->status->domain_data.pwdHistoryLength);
625 if (!io->g.lm_history) {
626 return ldb_oom(ldb);
627 }
628
629 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
630 io->o.lm_history_len); i++) {
631 io->g.lm_history[i+1] = io->o.lm_history[i];
632 }
633 io->g.lm_history_len = i + 1;
634
635 if (io->g.lm_hash) {
636 io->g.lm_history[0] = *io->g.lm_hash;
637 } else {
638 E_deshash("", io->g.lm_history[0].hash);
639 }
640
641 return LDB_SUCCESS;
642 }
643
644 static int setup_kerberos_keys(struct setup_password_fields_io *io)
645 {
646 struct ldb_context *ldb;
647 krb5_error_code krb5_ret;
648 Principal *salt_principal;
649 krb5_salt salt;
650 krb5_keyblock key;
651 krb5_data cleartext_data;
652
653 ldb = ldb_module_get_ctx(io->ac->module);
654 cleartext_data.data = io->n.cleartext_utf8->data;
655 cleartext_data.length = io->n.cleartext_utf8->length;
656
657 /* Many, many thanks to lukeh@padl.com for this
658 * algorithm, described in his Nov 10 2004 mail to
659 * samba-technical@samba.org */
660
661 /*
662 * Determine a salting principal
663 */
664 if (io->u.is_computer) {
665 char *name;
666 char *saltbody;
667
668 name = strlower_talloc(io->ac, io->u.sAMAccountName);
669 if (!name) {
670 return ldb_oom(ldb);
671 }
672
673 if (name[strlen(name)-1] == '$') {
674 name[strlen(name)-1] = '\0';
675 }
676
677 saltbody = talloc_asprintf(io->ac, "%s.%s", name,
678 io->ac->status->domain_data.dns_domain);
679 if (!saltbody) {
680 return ldb_oom(ldb);
681 }
682
683 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
684 &salt_principal,
685 io->ac->status->domain_data.realm,
686 "host", saltbody, NULL);
687 } else if (io->u.user_principal_name) {
688 char *user_principal_name;
689 char *p;
690
691 user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
692 if (!user_principal_name) {
693 return ldb_oom(ldb);
694 }
695
696 p = strchr(user_principal_name, '@');
697 if (p) {
698 p[0] = '\0';
699 }
700
701 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
702 &salt_principal,
703 io->ac->status->domain_data.realm,
704 user_principal_name, NULL);
705 } else {
706 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
707 &salt_principal,
708 io->ac->status->domain_data.realm,
709 io->u.sAMAccountName, NULL);
710 }
711 if (krb5_ret) {
712 ldb_asprintf_errstring(ldb,
713 "setup_kerberos_keys: "
714 "generation of a salting principal failed: %s",
715 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
716 krb5_ret, io->ac));
717 return LDB_ERR_OPERATIONS_ERROR;
718 }
719
720 /*
721 * create salt from salt_principal
722 */
723 krb5_ret = krb5_get_pw_salt(io->smb_krb5_context->krb5_context,
724 salt_principal, &salt);
725 krb5_free_principal(io->smb_krb5_context->krb5_context, salt_principal);
726 if (krb5_ret) {
727 ldb_asprintf_errstring(ldb,
728 "setup_kerberos_keys: "
729 "generation of krb5_salt failed: %s",
730 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
731 krb5_ret, io->ac));
732 return LDB_ERR_OPERATIONS_ERROR;
733 }
734 /* create a talloc copy */
735 io->g.salt = talloc_strndup(io->ac,
736 (char *)salt.saltvalue.data,
737 salt.saltvalue.length);
738 krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
739 if (!io->g.salt) {
740 return ldb_oom(ldb);
741 }
742 salt.saltvalue.data = discard_const(io->g.salt);
743 salt.saltvalue.length = strlen(io->g.salt);
744
745 /*
746 * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of
747 * the salt and the cleartext password
748 */
749 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
750 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
751 cleartext_data,
752 salt,
753 &key);
754 if (krb5_ret) {
755 ldb_asprintf_errstring(ldb,
756 "setup_kerberos_keys: "
757 "generation of a aes256-cts-hmac-sha1-96 key failed: %s",
758 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
759 krb5_ret, io->ac));
760 return LDB_ERR_OPERATIONS_ERROR;
761 }
762 io->g.aes_256 = data_blob_talloc(io->ac,
763 KRB5_KEY_DATA(&key),
764 KRB5_KEY_LENGTH(&key));
765 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
766 if (!io->g.aes_256.data) {
767 return ldb_oom(ldb);
768 }
769
770 /*
771 * create ENCTYPE_AES128_CTS_HMAC_SHA1_96 key out of
772 * the salt and the cleartext password
773 */
774 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
775 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
776 cleartext_data,
777 salt,
778 &key);
779 if (krb5_ret) {
780 ldb_asprintf_errstring(ldb,
781 "setup_kerberos_keys: "
782 "generation of a aes128-cts-hmac-sha1-96 key failed: %s",
783 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
784 krb5_ret, io->ac));
785 return LDB_ERR_OPERATIONS_ERROR;
786 }
787 io->g.aes_128 = data_blob_talloc(io->ac,
788 KRB5_KEY_DATA(&key),
789 KRB5_KEY_LENGTH(&key));
790 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
791 if (!io->g.aes_128.data) {
792 return ldb_oom(ldb);
793 }
794
795 /*
796 * create ENCTYPE_DES_CBC_MD5 key out of
797 * the salt and the cleartext password
798 */
799 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
800 ENCTYPE_DES_CBC_MD5,
801 cleartext_data,
802 salt,
803 &key);
804 if (krb5_ret) {
805 ldb_asprintf_errstring(ldb,
806 "setup_kerberos_keys: "
807 "generation of a des-cbc-md5 key failed: %s",
808 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
809 krb5_ret, io->ac));
810 return LDB_ERR_OPERATIONS_ERROR;
811 }
812 io->g.des_md5 = data_blob_talloc(io->ac,
813 KRB5_KEY_DATA(&key),
814 KRB5_KEY_LENGTH(&key));
815 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
816 if (!io->g.des_md5.data) {
817 return ldb_oom(ldb);
818 }
819
820 /*
821 * create ENCTYPE_DES_CBC_CRC key out of
822 * the salt and the cleartext password
823 */
824 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
825 ENCTYPE_DES_CBC_CRC,
826 cleartext_data,
827 salt,
828 &key);
829 if (krb5_ret) {
830 ldb_asprintf_errstring(ldb,
831 "setup_kerberos_keys: "
832 "generation of a des-cbc-crc key failed: %s",
833 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
834 krb5_ret, io->ac));
835 return LDB_ERR_OPERATIONS_ERROR;
836 }
837 io->g.des_crc = data_blob_talloc(io->ac,
838 KRB5_KEY_DATA(&key),
839 KRB5_KEY_LENGTH(&key));
840 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
841 if (!io->g.des_crc.data) {
842 return ldb_oom(ldb);
843 }
844
845 return LDB_SUCCESS;
846 }
847
848 static int setup_primary_kerberos(struct setup_password_fields_io *io,
849 const struct supplementalCredentialsBlob *old_scb,
850 struct package_PrimaryKerberosBlob *pkb)
851 {
852 struct ldb_context *ldb;
853 struct package_PrimaryKerberosCtr3 *pkb3 = &pkb->ctr.ctr3;
854 struct supplementalCredentialsPackage *old_scp = NULL;
855 struct package_PrimaryKerberosBlob _old_pkb;
856 struct package_PrimaryKerberosCtr3 *old_pkb3 = NULL;
857 uint32_t i;
858 enum ndr_err_code ndr_err;
859
860 ldb = ldb_module_get_ctx(io->ac->module);
861
862 /*
863 * prepare generation of keys
864 *
865 * ENCTYPE_DES_CBC_MD5
866 * ENCTYPE_DES_CBC_CRC
867 */
868 pkb->version = 3;
869 pkb3->salt.string = io->g.salt;
870 pkb3->num_keys = 2;
871 pkb3->keys = talloc_array(io->ac,
872 struct package_PrimaryKerberosKey3,
873 pkb3->num_keys);
874 if (!pkb3->keys) {
875 return ldb_oom(ldb);
876 }
877
878 pkb3->keys[0].keytype = ENCTYPE_DES_CBC_MD5;
879 pkb3->keys[0].value = &io->g.des_md5;
880 pkb3->keys[1].keytype = ENCTYPE_DES_CBC_CRC;
881 pkb3->keys[1].value = &io->g.des_crc;
882
883 /* initialize the old keys to zero */
884 pkb3->num_old_keys = 0;
885 pkb3->old_keys = NULL;
886
887 /* if there're no old keys, then we're done */
888 if (!old_scb) {
889 return LDB_SUCCESS;
890 }
891
892 for (i=0; i < old_scb->sub.num_packages; i++) {
893 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
894 continue;
895 }
896
897 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
898 continue;
899 }
900
901 old_scp = &old_scb->sub.packages[i];
902 break;
903 }
904 /* Primary:Kerberos element of supplementalCredentials */
905 if (old_scp) {
906 DATA_BLOB blob;
907
908 blob = strhex_to_data_blob(io->ac, old_scp->data);
909 if (!blob.data) {
910 return ldb_oom(ldb);
911 }
912
913 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
914 ndr_err = ndr_pull_struct_blob(&blob, io->ac, &_old_pkb,
915 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
916 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
917 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
918 ldb_asprintf_errstring(ldb,
919 "setup_primary_kerberos: "
920 "failed to pull old package_PrimaryKerberosBlob: %s",
921 nt_errstr(status));
922 return LDB_ERR_OPERATIONS_ERROR;
923 }
924
925 if (_old_pkb.version != 3) {
926 ldb_asprintf_errstring(ldb,
927 "setup_primary_kerberos: "
928 "package_PrimaryKerberosBlob version[%u] expected[3]",
929 _old_pkb.version);
930 return LDB_ERR_OPERATIONS_ERROR;
931 }
932
933 old_pkb3 = &_old_pkb.ctr.ctr3;
934 }
935
936 /* if we didn't found the old keys we're done */
937 if (!old_pkb3) {
938 return LDB_SUCCESS;
939 }
940
941 /* fill in the old keys */
942 pkb3->num_old_keys = old_pkb3->num_keys;
943 pkb3->old_keys = old_pkb3->keys;
944
945 return LDB_SUCCESS;
946 }
947
948 static int setup_primary_kerberos_newer(struct setup_password_fields_io *io,
949 const struct supplementalCredentialsBlob *old_scb,
950 struct package_PrimaryKerberosBlob *pkb)
951 {
952 struct ldb_context *ldb;
953 struct package_PrimaryKerberosCtr4 *pkb4 = &pkb->ctr.ctr4;
954 struct supplementalCredentialsPackage *old_scp = NULL;
955 struct package_PrimaryKerberosBlob _old_pkb;
956 struct package_PrimaryKerberosCtr4 *old_pkb4 = NULL;
957 uint32_t i;
958 enum ndr_err_code ndr_err;
959
960 ldb = ldb_module_get_ctx(io->ac->module);
961
962 /*
963 * prepare generation of keys
964 *
965 * ENCTYPE_AES256_CTS_HMAC_SHA1_96
966 * ENCTYPE_AES128_CTS_HMAC_SHA1_96
967 * ENCTYPE_DES_CBC_MD5
968 * ENCTYPE_DES_CBC_CRC
969 */
970 pkb->version = 4;
971 pkb4->salt.string = io->g.salt;
972 pkb4->default_iteration_count = 4096;
973 pkb4->num_keys = 4;
974
975 pkb4->keys = talloc_array(io->ac,
976 struct package_PrimaryKerberosKey4,
977 pkb4->num_keys);
978 if (!pkb4->keys) {
979 return ldb_oom(ldb);
980 }
981
982 pkb4->keys[0].iteration_count = 4096;
983 pkb4->keys[0].keytype = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
984 pkb4->keys[0].value = &io->g.aes_256;
985 pkb4->keys[1].iteration_count = 4096;
986 pkb4->keys[1].keytype = ENCTYPE_AES128_CTS_HMAC_SHA1_96;
987 pkb4->keys[1].value = &io->g.aes_128;
988 pkb4->keys[2].iteration_count = 4096;
989 pkb4->keys[2].keytype = ENCTYPE_DES_CBC_MD5;
990 pkb4->keys[2].value = &io->g.des_md5;
991 pkb4->keys[3].iteration_count = 4096;
992 pkb4->keys[3].keytype = ENCTYPE_DES_CBC_CRC;
993 pkb4->keys[3].value = &io->g.des_crc;
994
995 /* initialize the old keys to zero */
996 pkb4->num_old_keys = 0;
997 pkb4->old_keys = NULL;
998 pkb4->num_older_keys = 0;
999 pkb4->older_keys = NULL;
1000
1001 /* if there're no old keys, then we're done */
1002 if (!old_scb) {
1003 return LDB_SUCCESS;
1004 }
1005
1006 for (i=0; i < old_scb->sub.num_packages; i++) {
1007 if (strcmp("Primary:Kerberos-Newer-Keys", old_scb->sub.packages[i].name) != 0) {
1008 continue;
1009 }
1010
1011 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
1012 continue;
1013 }
1014
1015 old_scp = &old_scb->sub.packages[i];
1016 break;
1017 }
1018 /* Primary:Kerberos-Newer-Keys element of supplementalCredentials */
1019 if (old_scp) {
1020 DATA_BLOB blob;
1021
1022 blob = strhex_to_data_blob(io->ac, old_scp->data);
1023 if (!blob.data) {
1024 return ldb_oom(ldb);
1025 }
1026
1027 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
1028 ndr_err = ndr_pull_struct_blob(&blob, io->ac,
1029 &_old_pkb,
1030 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
1031 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1032 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1033 ldb_asprintf_errstring(ldb,
1034 "setup_primary_kerberos_newer: "
1035 "failed to pull old package_PrimaryKerberosBlob: %s",
1036 nt_errstr(status));
1037 return LDB_ERR_OPERATIONS_ERROR;
1038 }
1039
1040 if (_old_pkb.version != 4) {
1041 ldb_asprintf_errstring(ldb,
1042 "setup_primary_kerberos_newer: "
1043 "package_PrimaryKerberosBlob version[%u] expected[4]",
1044 _old_pkb.version);
1045 return LDB_ERR_OPERATIONS_ERROR;
1046 }
1047
1048 old_pkb4 = &_old_pkb.ctr.ctr4;
1049 }
1050
1051 /* if we didn't found the old keys we're done */
1052 if (!old_pkb4) {
1053 return LDB_SUCCESS;
1054 }
1055
1056 /* fill in the old keys */
1057 pkb4->num_old_keys = old_pkb4->num_keys;
1058 pkb4->old_keys = old_pkb4->keys;
1059 pkb4->num_older_keys = old_pkb4->num_old_keys;
1060 pkb4->older_keys = old_pkb4->old_keys;
1061
1062 return LDB_SUCCESS;
1063 }
1064
1065 static int setup_primary_wdigest(struct setup_password_fields_io *io,
1066 const struct supplementalCredentialsBlob *old_scb,
1067 struct package_PrimaryWDigestBlob *pdb)
1068 {
1069 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1070 DATA_BLOB sAMAccountName;
1071 DATA_BLOB sAMAccountName_l;
1072 DATA_BLOB sAMAccountName_u;
1073 const char *user_principal_name = io->u.user_principal_name;
1074 DATA_BLOB userPrincipalName;
1075 DATA_BLOB userPrincipalName_l;
1076 DATA_BLOB userPrincipalName_u;
1077 DATA_BLOB netbios_domain;
1078 DATA_BLOB netbios_domain_l;
1079 DATA_BLOB netbios_domain_u;
1080 DATA_BLOB dns_domain;
1081 DATA_BLOB dns_domain_l;
1082 DATA_BLOB dns_domain_u;
1083 DATA_BLOB digest;
1084 DATA_BLOB delim;
1085 DATA_BLOB backslash;
1086 uint8_t i;
1087 struct {
1088 DATA_BLOB *user;
1089 DATA_BLOB *realm;
1090 DATA_BLOB *nt4dom;
1091 } wdigest[] = {
1092 /*
1093 * See
1094 * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
1095 * for what precalculated hashes are supposed to be stored...
1096 *
1097 * I can't reproduce all values which should contain "Digest" as realm,
1098 * am I doing something wrong or is w2k3 just broken...?
1099 *
1100 * W2K3 fills in following for a user:
1101 *
1102 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1103 * sAMAccountName: NewUser2Sam
1104 * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
1105 *
1106 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1107 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1108 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1109 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1110 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1111 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1112 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1113 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1114 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1115 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1116 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1117 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1118 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1119 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1120 * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1121 * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1122 * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1123 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1124 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1125 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1126 * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
1127 * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
1128 * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
1129 * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
1130 * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
1131 * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
1132 * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
1133 * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
1134 * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
1135 *
1136 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1137 * sAMAccountName: NewUser2Sam
1138 *
1139 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1140 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1141 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1142 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1143 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1144 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1145 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1146 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1147 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1148 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1149 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1150 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1151 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1152 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1153 * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1154 * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1155 * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1156 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1157 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1158 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1159 * 31dc704d3640335b2123d4ee28aa1f11 => ???M1 changes with NewUser2Sam => NewUser1Sam
1160 * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
1161 * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
1162 * 569b4533f2d9e580211dd040e5e360a8 => ???M2 changes with NewUser2Princ => NewUser1Princ
1163 * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
1164 * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
1165 * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
1166 * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
1167 * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
1168 */
1169
1170 /*
1171 * sAMAccountName, netbios_domain
1172 */
1173 {
1174 .user = &sAMAccountName,
1175 .realm = &netbios_domain,
1176 },
1177 {
1178 .user = &sAMAccountName_l,
1179 .realm = &netbios_domain_l,
1180 },
1181 {
1182 .user = &sAMAccountName_u,
1183 .realm = &netbios_domain_u,
1184 },
1185 {
1186 .user = &sAMAccountName,
1187 .realm = &netbios_domain_u,
1188 },
1189 {
1190 .user = &sAMAccountName,
1191 .realm = &netbios_domain_l,
1192 },
1193 {
1194 .user = &sAMAccountName_u,
1195 .realm = &netbios_domain_l,
1196 },
1197 {
1198 .user = &sAMAccountName_l,
1199 .realm = &netbios_domain_u,
1200 },
1201 /*
1202 * sAMAccountName, dns_domain
1203 */
1204 {
1205 .user = &sAMAccountName,
1206 .realm = &dns_domain,
1207 },
1208 {
1209 .user = &sAMAccountName_l,
1210 .realm = &dns_domain_l,
1211 },
1212 {
1213 .user = &sAMAccountName_u,
1214 .realm = &dns_domain_u,
1215 },
1216 {
1217 .user = &sAMAccountName,
1218 .realm = &dns_domain_u,
1219 },
1220 {
1221 .user = &sAMAccountName,
1222 .realm = &dns_domain_l,
1223 },
1224 {
1225 .user = &sAMAccountName_u,
1226 .realm = &dns_domain_l,
1227 },
1228 {
1229 .user = &sAMAccountName_l,
1230 .realm = &dns_domain_u,
1231 },
1232 /*
1233 * userPrincipalName, no realm
1234 */
1235 {
1236 .user = &userPrincipalName,
1237 },
1238 {
1239 /*
1240 * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
1241 * the fallback to the sAMAccountName based userPrincipalName is correct
1242 */
1243 .user = &userPrincipalName_l,
1244 },
1245 {
1246 .user = &userPrincipalName_u,
1247 },
1248 /*
1249 * nt4dom\sAMAccountName, no realm
1250 */
1251 {
1252 .user = &sAMAccountName,
1253 .nt4dom = &netbios_domain
1254 },
1255 {
1256 .user = &sAMAccountName_l,
1257 .nt4dom = &netbios_domain_l
1258 },
1259 {
1260 .user = &sAMAccountName_u,
1261 .nt4dom = &netbios_domain_u
1262 },
1263
1264 /*
1265 * the following ones are guessed depending on the technet2 article
1266 * but not reproducable on a w2k3 server
1267 */
1268 /* sAMAccountName with "Digest" realm */
1269 {
1270 .user = &sAMAccountName,
1271 .realm = &digest
1272 },
1273 {
1274 .user = &sAMAccountName_l,
1275 .realm = &digest
1276 },
1277 {
1278 .user = &sAMAccountName_u,
1279 .realm = &digest
1280 },
1281 /* userPrincipalName with "Digest" realm */
1282 {
1283 .user = &userPrincipalName,
1284 .realm = &digest
1285 },
1286 {
1287 .user = &userPrincipalName_l,
1288 .realm = &digest
1289 },
1290 {
1291 .user = &userPrincipalName_u,
1292 .realm = &digest
1293 },
1294 /* nt4dom\\sAMAccountName with "Digest" realm */
1295 {
1296 .user = &sAMAccountName,
1297 .nt4dom = &netbios_domain,
1298 .realm = &digest
1299 },
1300 {
1301 .user = &sAMAccountName_l,
1302 .nt4dom = &netbios_domain_l,
1303 .realm = &digest
1304 },
1305 {
1306 .user = &sAMAccountName_u,
1307 .nt4dom = &netbios_domain_u,
1308 .realm = &digest
1309 },
1310 };
1311
1312 /* prepare DATA_BLOB's used in the combinations array */
1313 sAMAccountName = data_blob_string_const(io->u.sAMAccountName);
1314 sAMAccountName_l = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
1315 if (!sAMAccountName_l.data) {
1316 return ldb_oom(ldb);
1317 }
1318 sAMAccountName_u = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
1319 if (!sAMAccountName_u.data) {
1320 return ldb_oom(ldb);
1321 }
1322
1323 /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
1324 if (!user_principal_name) {
1325 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
1326 io->u.sAMAccountName,
1327 io->ac->status->domain_data.dns_domain);
1328 if (!user_principal_name) {
1329 return ldb_oom(ldb);
1330 }
1331 }
1332 userPrincipalName = data_blob_string_const(user_principal_name);
1333 userPrincipalName_l = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
1334 if (!userPrincipalName_l.data) {
1335 return ldb_oom(ldb);
1336 }
1337 userPrincipalName_u = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
1338 if (!userPrincipalName_u.data) {
1339 return ldb_oom(ldb);
1340 }
1341
1342 netbios_domain = data_blob_string_const(io->ac->status->domain_data.netbios_domain);
1343 netbios_domain_l = data_blob_string_const(strlower_talloc(io->ac,
1344 io->ac->status->domain_data.netbios_domain));
1345 if (!netbios_domain_l.data) {
1346 return ldb_oom(ldb);
1347 }
1348 netbios_domain_u = data_blob_string_const(strupper_talloc(io->ac,
1349 io->ac->status->domain_data.netbios_domain));
1350 if (!netbios_domain_u.data) {
1351 return ldb_oom(ldb);
1352 }
1353
1354 dns_domain = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1355 dns_domain_l = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1356 dns_domain_u = data_blob_string_const(io->ac->status->domain_data.realm);
1357
1358 digest = data_blob_string_const("Digest");
1359
1360 delim = data_blob_string_const(":");
1361 backslash = data_blob_string_const("\\");
1362
1363 pdb->num_hashes = ARRAY_SIZE(wdigest);
1364 pdb->hashes = talloc_array(io->ac, struct package_PrimaryWDigestHash,
1365 pdb->num_hashes);
1366 if (!pdb->hashes) {
1367 return ldb_oom(ldb);
1368 }
1369
1370 for (i=0; i < ARRAY_SIZE(wdigest); i++) {
1371 struct MD5Context md5;
1372 MD5Init(&md5);
1373 if (wdigest[i].nt4dom) {
1374 MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
1375 MD5Update(&md5, backslash.data, backslash.length);
1376 }
1377 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
1378 MD5Update(&md5, delim.data, delim.length);
1379 if (wdigest[i].realm) {
1380 MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
1381 }
1382 MD5Update(&md5, delim.data, delim.length);
1383 MD5Update(&md5, io->n.cleartext_utf8->data, io->n.cleartext_utf8->length);
1384 MD5Final(pdb->hashes[i].hash, &md5);
1385 }
1386
1387 return LDB_SUCCESS;
1388 }
1389
1390 static int setup_supplemental_field(struct setup_password_fields_io *io)
1391 {
1392 struct ldb_context *ldb;
1393 struct supplementalCredentialsBlob scb;
1394 struct supplementalCredentialsBlob _old_scb;
1395 struct supplementalCredentialsBlob *old_scb = NULL;
1396 /* Packages + (Kerberos-Newer-Keys, Kerberos, WDigest and CLEARTEXT) */
1397 uint32_t num_names = 0;
1398 const char *names[1+4];
1399 uint32_t num_packages = 0;
1400 struct supplementalCredentialsPackage packages[1+4];
1401 /* Packages */
1402 struct supplementalCredentialsPackage *pp = NULL;
1403 struct package_PackagesBlob pb;
1404 DATA_BLOB pb_blob;
1405 char *pb_hexstr;
1406 /* Primary:Kerberos-Newer-Keys */
1407 const char **nkn = NULL;
1408 struct supplementalCredentialsPackage *pkn = NULL;
1409 struct package_PrimaryKerberosBlob pknb;
1410 DATA_BLOB pknb_blob;
1411 char *pknb_hexstr;
1412 /* Primary:Kerberos */
1413 const char **nk = NULL;
1414 struct supplementalCredentialsPackage *pk = NULL;
1415 struct package_PrimaryKerberosBlob pkb;
1416 DATA_BLOB pkb_blob;
1417 char *pkb_hexstr;
1418 /* Primary:WDigest */
1419 const char **nd = NULL;
1420 struct supplementalCredentialsPackage *pd = NULL;
1421 struct package_PrimaryWDigestBlob pdb;
1422 DATA_BLOB pdb_blob;
1423 char *pdb_hexstr;
1424 /* Primary:CLEARTEXT */
1425 const char **nc = NULL;
1426 struct supplementalCredentialsPackage *pc = NULL;
1427 struct package_PrimaryCLEARTEXTBlob pcb;
1428 DATA_BLOB pcb_blob;
1429 char *pcb_hexstr;
1430 int ret;
1431 enum ndr_err_code ndr_err;
1432 uint8_t zero16[16];
1433 bool do_newer_keys = false;
1434 bool do_cleartext = false;
1435
1436 ZERO_STRUCT(zero16);
1437 ZERO_STRUCT(names);
1438
1439 ldb = ldb_module_get_ctx(io->ac->module);
1440
1441 if (!io->n.cleartext_utf8) {
1442 /*
1443 * when we don't have a cleartext password
1444 * we can't setup a supplementalCredential value
1445 */
1446 return LDB_SUCCESS;
1447 }
1448
1449 /* if there's an old supplementaCredentials blob then parse it */
1450 if (io->o.supplemental) {
1451 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
1452 &_old_scb,
1453 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
1454 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1455 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1456 ldb_asprintf_errstring(ldb,
1457 "setup_supplemental_field: "
1458 "failed to pull old supplementalCredentialsBlob: %s",
1459 nt_errstr(status));
1460 return LDB_ERR_OPERATIONS_ERROR;
1461 }
1462
1463 if (_old_scb.sub.signature == SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
1464 old_scb = &_old_scb;
1465 } else {
1466 ldb_debug(ldb, LDB_DEBUG_ERROR,
1467 "setup_supplemental_field: "
1468 "supplementalCredentialsBlob signature[0x%04X] expected[0x%04X]",
1469 _old_scb.sub.signature, SUPPLEMENTAL_CREDENTIALS_SIGNATURE);
1470 }
1471 }
1472 /* Per MS-SAMR 3.1.1.8.11.6 we create AES keys if our domain functionality level is 2008 or higher */
1473 do_newer_keys = (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008);
1474
1475 if (io->ac->status->domain_data.store_cleartext &&
1476 (io->u.userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
1477 do_cleartext = true;
1478 }
1479
1480 /*
1481 * The ordering is this
1482 *
1483 * Primary:Kerberos-Newer-Keys (optional)
1484 * Primary:Kerberos
1485 * Primary:WDigest
1486 * Primary:CLEARTEXT (optional)
1487 *
1488 * And the 'Packages' package is insert before the last
1489 * other package.
1490 */
1491 if (do_newer_keys) {
1492 /* Primary:Kerberos-Newer-Keys */
1493 nkn = &names[num_names++];
1494 pkn = &packages[num_packages++];
1495 }
1496
1497 /* Primary:Kerberos */
1498 nk = &names[num_names++];
1499 pk = &packages[num_packages++];
1500
1501 if (!do_cleartext) {
1502 /* Packages */
1503 pp = &packages[num_packages++];
1504 }
1505
1506 /* Primary:WDigest */
1507 nd = &names[num_names++];
1508 pd = &packages[num_packages++];
1509
1510 if (do_cleartext) {
1511 /* Packages */
1512 pp = &packages[num_packages++];
1513
1514 /* Primary:CLEARTEXT */
1515 nc = &names[num_names++];
1516 pc = &packages[num_packages++];
1517 }
1518
1519 if (pkn) {
1520 /*
1521 * setup 'Primary:Kerberos-Newer-Keys' element
1522 */
1523 *nkn = "Kerberos-Newer-Keys";
1524
1525 ret = setup_primary_kerberos_newer(io, old_scb, &pknb);
1526 if (ret != LDB_SUCCESS) {
1527 return ret;
1528 }
1529
1530 ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac,
1531 &pknb,
1532 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1533 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1534 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1535 ldb_asprintf_errstring(ldb,
1536 "setup_supplemental_field: "
1537 "failed to push package_PrimaryKerberosNeverBlob: %s",
1538 nt_errstr(status));
1539 return LDB_ERR_OPERATIONS_ERROR;
1540 }
1541 pknb_hexstr = data_blob_hex_string_upper(io->ac, &pknb_blob);
1542 if (!pknb_hexstr) {
1543 return ldb_oom(ldb);
1544 }
1545 pkn->name = "Primary:Kerberos-Newer-Keys";
1546 pkn->reserved = 1;
1547 pkn->data = pknb_hexstr;
1548 }
1549
1550 /*
1551 * setup 'Primary:Kerberos' element
1552 */
1553 *nk = "Kerberos";
1554
1555 ret = setup_primary_kerberos(io, old_scb, &pkb);
1556 if (ret != LDB_SUCCESS) {
1557 return ret;
1558 }
1559
1560 ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
1561 &pkb,
1562 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1563 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1564 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1565 ldb_asprintf_errstring(ldb,
1566 "setup_supplemental_field: "
1567 "failed to push package_PrimaryKerberosBlob: %s",
1568 nt_errstr(status));
1569 return LDB_ERR_OPERATIONS_ERROR;
1570 }
1571 pkb_hexstr = data_blob_hex_string_upper(io->ac, &pkb_blob);
1572 if (!pkb_hexstr) {
1573 return ldb_oom(ldb);
1574 }
1575 pk->name = "Primary:Kerberos";
1576 pk->reserved = 1;
1577 pk->data = pkb_hexstr;
1578
1579 /*
1580 * setup 'Primary:WDigest' element
1581 */
1582 *nd = "WDigest";
1583
1584 ret = setup_primary_wdigest(io, old_scb, &pdb);
1585 if (ret != LDB_SUCCESS) {
1586 return ret;
1587 }
1588
1589 ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
1590 &pdb,
1591 (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
1592 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1593 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1594 ldb_asprintf_errstring(ldb,
1595 "setup_supplemental_field: "
1596 "failed to push package_PrimaryWDigestBlob: %s",
1597 nt_errstr(status));
1598 return LDB_ERR_OPERATIONS_ERROR;
1599 }
1600 pdb_hexstr = data_blob_hex_string_upper(io->ac, &pdb_blob);
1601 if (!pdb_hexstr) {
1602 return ldb_oom(ldb);
1603 }
1604 pd->name = "Primary:WDigest";
1605 pd->reserved = 1;
1606 pd->data = pdb_hexstr;
1607
1608 /*
1609 * setup 'Primary:CLEARTEXT' element
1610 */
1611 if (pc) {
1612 *nc = "CLEARTEXT";
1613
1614 pcb.cleartext = *io->n.cleartext_utf16;
1615
1616 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
1617 &pcb,
1618 (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
1619 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1620 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1621 ldb_asprintf_errstring(ldb,
1622 "setup_supplemental_field: "
1623 "failed to push package_PrimaryCLEARTEXTBlob: %s",
1624 nt_errstr(status));
1625 return LDB_ERR_OPERATIONS_ERROR;
1626 }
1627 pcb_hexstr = data_blob_hex_string_upper(io->ac, &pcb_blob);
1628 if (!pcb_hexstr) {
1629 return ldb_oom(ldb);
1630 }
1631 pc->name = "Primary:CLEARTEXT";
1632 pc->reserved = 1;
1633 pc->data = pcb_hexstr;
1634 }
1635
1636 /*
1637 * setup 'Packages' element
1638 */
1639 pb.names = names;
1640 ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1641 &pb,
1642 (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1643 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1644 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1645 ldb_asprintf_errstring(ldb,
1646 "setup_supplemental_field: "
1647 "failed to push package_PackagesBlob: %s",
1648 nt_errstr(status));
1649 return LDB_ERR_OPERATIONS_ERROR;
1650 }
1651 pb_hexstr = data_blob_hex_string_upper(io->ac, &pb_blob);
1652 if (!pb_hexstr) {
1653 return ldb_oom(ldb);
1654 }
1655 pp->name = "Packages";
1656 pp->reserved = 2;
1657 pp->data = pb_hexstr;
1658
1659 /*
1660 * setup 'supplementalCredentials' value
1661 */
1662 ZERO_STRUCT(scb);
1663 scb.sub.num_packages = num_packages;
1664 scb.sub.packages = packages;
1665
1666 ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1667 &scb,
1668 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1669 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1670 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1671 ldb_asprintf_errstring(ldb,
1672 "setup_supplemental_field: "
1673 "failed to push supplementalCredentialsBlob: %s",
1674 nt_errstr(status));
1675 return LDB_ERR_OPERATIONS_ERROR;
1676 }
1677
1678 return LDB_SUCCESS;
1679 }
1680
1681 static int setup_last_set_field(struct setup_password_fields_io *io)
1682 {
1683 const struct ldb_message *msg = NULL;
1684
1685 switch (io->ac->req->operation) {
1686 case LDB_ADD:
1687 msg = io->ac->req->op.add.message;
1688 break;
1689 case LDB_MODIFY:
1690 msg = io->ac->req->op.mod.message;
1691 break;
1692 default:
1693 return LDB_ERR_OPERATIONS_ERROR;
1694 break;
1695 }
1696
1697 if (io->ac->pwd_last_set_bypass) {
1698 struct ldb_message_element *el;
1699
1700 if (msg == NULL) {
1701 return LDB_ERR_CONSTRAINT_VIOLATION;
1702 }
1703
1704 el = ldb_msg_find_element(msg, "pwdLastSet");
1705 if (el == NULL) {
1706 return LDB_ERR_CONSTRAINT_VIOLATION;
1707 }
1708
1709 io->g.last_set = samdb_result_nttime(msg, "pwdLastSet", 0);
1710 return LDB_SUCCESS;
1711 }
1712
1713 /* set it as now */
1714 unix_to_nt_time(&io->g.last_set, time(NULL));
1715
1716 return LDB_SUCCESS;
1717 }
1718
1719 static int setup_given_passwords(struct setup_password_fields_io *io,
1720 struct setup_password_fields_given *g)
1721 {
1722 struct ldb_context *ldb;
1723 bool ok;
1724
1725 ldb = ldb_module_get_ctx(io->ac->module);
1726
1727 if (g->cleartext_utf8) {
1728 struct ldb_val *cleartext_utf16_blob;
1729
1730 cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
1731 if (!cleartext_utf16_blob) {
1732 return ldb_oom(ldb);
1733 }
1734 if (!convert_string_talloc(io->ac,
1735 CH_UTF8, CH_UTF16,
1736 g->cleartext_utf8->data,
1737 g->cleartext_utf8->length,
1738 (void *)&cleartext_utf16_blob->data,
1739 &cleartext_utf16_blob->length)) {
1740 if (g->cleartext_utf8->length != 0) {
1741 talloc_free(cleartext_utf16_blob);
1742 ldb_asprintf_errstring(ldb,
1743 "setup_password_fields: "
1744 "failed to generate UTF16 password from cleartext UTF8 one for user '%s'!",
1745 io->u.sAMAccountName);
1746 return LDB_ERR_CONSTRAINT_VIOLATION;
1747 } else {
1748 /* passwords with length "0" are valid! */
1749 cleartext_utf16_blob->data = NULL;
1750 cleartext_utf16_blob->length = 0;
1751 }
1752 }
1753 g->cleartext_utf16 = cleartext_utf16_blob;
1754 } else if (g->cleartext_utf16) {
1755 struct ldb_val *cleartext_utf8_blob;
1756
1757 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
1758 if (!cleartext_utf8_blob) {
1759 return ldb_oom(ldb);
1760 }
1761 if (!convert_string_talloc(io->ac,
1762 CH_UTF16MUNGED, CH_UTF8,
1763 g->cleartext_utf16->data,
1764 g->cleartext_utf16->length,
1765 (void *)&cleartext_utf8_blob->data,
1766 &cleartext_utf8_blob->length)) {
1767 if (g->cleartext_utf16->length != 0) {
1768 /* We must bail out here, the input wasn't even
1769 * a multiple of 2 bytes */
1770 talloc_free(cleartext_utf8_blob);
1771 ldb_asprintf_errstring(ldb,
1772 "setup_password_fields: "
1773 "failed to generate UTF8 password from cleartext UTF 16 one for user '%s' - the latter had odd length (length must be a multiple of 2)!",
1774 io->u.sAMAccountName);
1775 return LDB_ERR_CONSTRAINT_VIOLATION;
1776 } else {
1777 /* passwords with length "0" are valid! */
1778 cleartext_utf8_blob->data = NULL;
1779 cleartext_utf8_blob->length = 0;
1780 }
1781 }
1782 g->cleartext_utf8 = cleartext_utf8_blob;
1783 }
1784
1785 if (g->cleartext_utf16) {
1786 struct samr_Password *nt_hash;
1787
1788 nt_hash = talloc(io->ac, struct samr_Password);
1789 if (!nt_hash) {
1790 return ldb_oom(ldb);
1791 }
1792 g->nt_hash = nt_hash;
1793
1794 /* compute the new nt hash */
1795 mdfour(nt_hash->hash,
1796 g->cleartext_utf16->data,
1797 g->cleartext_utf16->length);
1798 }
1799
1800 if (g->cleartext_utf8) {
1801 struct samr_Password *lm_hash;
1802
1803 lm_hash = talloc(io->ac, struct samr_Password);
1804 if (!lm_hash) {
1805 return ldb_oom(ldb);
1806 }
1807
1808 /* compute the new lm hash */
1809 ok = E_deshash((char *)g->cleartext_utf8->data, lm_hash->hash);
1810 if (ok) {
1811 g->lm_hash = lm_hash;
1812 } else {
1813 talloc_free(lm_hash);
1814 }
1815 }
1816
1817 return LDB_SUCCESS;
1818 }
1819
1820 static int setup_password_fields(struct setup_password_fields_io *io)
1821 {
1822 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1823 struct loadparm_context *lp_ctx =
1824 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
1825 struct loadparm_context);
1826 int ret;
1827
1828 /* transform the old password (for password changes) */
1829 ret = setup_given_passwords(io, &io->og);
1830 if (ret != LDB_SUCCESS) {
1831 return ret;
1832 }
1833
1834 /* transform the new password */
1835 ret = setup_given_passwords(io, &io->n);
1836 if (ret != LDB_SUCCESS) {
1837 return ret;
1838 }
1839
1840 if (io->n.cleartext_utf8) {
1841 ret = setup_kerberos_keys(io);
1842 if (ret != LDB_SUCCESS) {
1843 return ret;
1844 }
1845 }
1846
1847 ret = setup_nt_fields(io);
1848 if (ret != LDB_SUCCESS) {
1849 return ret;
1850 }
1851
1852 if (lpcfg_lanman_auth(lp_ctx)) {
1853 ret = setup_lm_fields(io);
1854 if (ret != LDB_SUCCESS) {
1855 return ret;
1856 }
1857 } else {
1858 io->g.lm_hash = NULL;
1859 io->g.lm_history_len = 0;
1860 }
1861
1862 ret = setup_supplemental_field(io);
1863 if (ret != LDB_SUCCESS) {
1864 return ret;
1865 }
1866
1867 ret = setup_last_set_field(io);
1868 if (ret != LDB_SUCCESS) {
1869 return ret;
1870 }
1871
1872 return LDB_SUCCESS;
1873 }
1874
1875 static int check_password_restrictions(struct setup_password_fields_io *io)
1876 {
1877 struct ldb_context *ldb;
1878 int ret;
1879 enum samr_ValidationStatus stat;
1880
1881 ldb = ldb_module_get_ctx(io->ac->module);
1882
1883 /* First check the old password is correct, for password changes */
1884 if (!io->ac->pwd_reset) {
1885 bool nt_hash_checked = false;
1886
1887 /* we need the old nt or lm hash given by the client */
1888 if (!io->og.nt_hash && !io->og.lm_hash) {
1889 ldb_asprintf_errstring(ldb,
1890 "check_password_restrictions: "
1891 "You need to provide the old password in order "
1892 "to change it!");
1893 return LDB_ERR_UNWILLING_TO_PERFORM;
1894 }
1895
1896 /* The password modify through the NT hash is encouraged and
1897 has no problems at all */
1898 if (io->og.nt_hash) {
1899 if (!io->o.nt_hash) {
1900 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1901 ldb_asprintf_errstring(ldb,
1902 "%08X: %s - check_password_restrictions: "
1903 "There's no old nt_hash, which is needed "
1904 "in order to change your password!",
1905 W_ERROR_V(WERR_INVALID_PASSWORD),
1906 ldb_strerror(ret));
1907 return ret;
1908 }
1909
1910 if (memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
1911 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1912 ldb_asprintf_errstring(ldb,
1913 "%08X: %s - check_password_restrictions: "
1914 "The old password specified doesn't match!",
1915 W_ERROR_V(WERR_INVALID_PASSWORD),
1916 ldb_strerror(ret));
1917 return ret;
1918 }
1919
1920 nt_hash_checked = true;
1921 }
1922
1923 /* But it is also possible to change a password by the LM hash
1924 * alone for compatibility reasons. This check is optional if
1925 * the NT hash was already checked - otherwise it's mandatory.
1926 * (as the SAMR operations request it). */
1927 if (io->og.lm_hash) {
1928 if (!io->o.lm_hash && !nt_hash_checked) {
1929 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1930 ldb_asprintf_errstring(ldb,
1931 "%08X: %s - check_password_restrictions: "
1932 "There's no old lm_hash, which is needed "
1933 "in order to change your password!",
1934 W_ERROR_V(WERR_INVALID_PASSWORD),
1935 ldb_strerror(ret));
1936 return ret;
1937 }
1938
1939 if (io->o.lm_hash &&
1940 memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0) {
1941 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1942 ldb_asprintf_errstring(ldb,
1943 "%08X: %s - check_password_restrictions: "
1944 "The old password specified doesn't match!",
1945 W_ERROR_V(WERR_INVALID_PASSWORD),
1946 ldb_strerror(ret));
1947 return ret;
1948 }
1949 }
1950 }
1951
1952 if (io->u.restrictions == 0) {
1953 /* FIXME: Is this right? */
1954 return LDB_SUCCESS;
1955 }
1956
1957 /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
1958 if ((io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) &&
1959 !io->ac->pwd_reset)
1960 {
1961 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1962 ldb_asprintf_errstring(ldb,
1963 "%08X: %s - check_password_restrictions: "
1964 "password is too young to change!",
1965 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1966 ldb_strerror(ret));
1967 return ret;
1968 }
1969
1970 /*
1971 * Fundamental password checks done by the call
1972 * "samdb_check_password".
1973 * It is also in use by "dcesrv_samr_ValidatePassword".
1974 */
1975 if (io->n.cleartext_utf8 != NULL) {
1976 stat = samdb_check_password(io->n.cleartext_utf8,
1977 io->ac->status->domain_data.pwdProperties,
1978 io->ac->status->domain_data.minPwdLength);
1979 switch (stat) {
1980 case SAMR_VALIDATION_STATUS_SUCCESS:
1981 /* perfect -> proceed! */
1982 break;
1983
1984 case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
1985 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1986 ldb_asprintf_errstring(ldb,
1987 "%08X: %s - check_password_restrictions: "
1988 "the password is too short. It should be equal or longer than %u characters!",
1989 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1990 ldb_strerror(ret),
1991 io->ac->status->domain_data.minPwdLength);
1992 io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
1993 return ret;
1994
1995 case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
1996 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1997 ldb_asprintf_errstring(ldb,
1998 "%08X: %s - check_password_restrictions: "
1999 "the password does not meet the complexity criteria!",
2000 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2001 ldb_strerror(ret));
2002 io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
2003 return ret;
2004
2005 default:
2006 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2007 ldb_asprintf_errstring(ldb,
2008 "%08X: %s - check_password_restrictions: "
2009 "the password doesn't fit by a certain reason!",
2010 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2011 ldb_strerror(ret));
2012 return ret;
2013 }
2014 }
2015
2016 if (io->ac->pwd_reset) {
2017 return LDB_SUCCESS;
2018 }
2019
2020 if (io->n.nt_hash) {
2021 uint32_t i;
2022
2023 /* checks the NT hash password history */
2024 for (i = 0; i < io->o.nt_history_len; i++) {
2025 ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
2026 if (ret == 0) {
2027 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2028 ldb_asprintf_errstring(ldb,
2029 "%08X: %s - check_password_restrictions: "
2030 "the password was already used (in history)!",
2031 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2032 ldb_strerror(ret));
2033 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2034 return ret;
2035 }
2036 }
2037 }
2038
2039 if (io->n.lm_hash) {
2040 uint32_t i;
2041
2042 /* checks the LM hash password history */
2043 for (i = 0; i < io->o.lm_history_len; i++) {
2044 ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
2045 if (ret == 0) {
2046 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2047 ldb_asprintf_errstring(ldb,
2048 "%08X: %s - check_password_restrictions: "
2049 "the password was already used (in history)!",
2050 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2051 ldb_strerror(ret));
2052 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2053 return ret;
2054 }
2055 }
2056 }
2057
2058 /* are all password changes disallowed? */
2059 if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
2060 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2061 ldb_asprintf_errstring(ldb,
2062 "%08X: %s - check_password_restrictions: "
2063 "password changes disabled!",
2064 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2065 ldb_strerror(ret));
2066 return ret;
2067 }
2068
2069 /* can this user change the password? */
2070 if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
2071 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2072 ldb_asprintf_errstring(ldb,
2073 "%08X: %s - check_password_restrictions: "
2074 "password can't be changed on this account!",
2075 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2076 ldb_strerror(ret));
2077 return ret;
2078 }
2079
2080 return LDB_SUCCESS;
2081 }
2082
2083 /*
2084 * This is intended for use by the "password_hash" module since there
2085 * password changes can be specified through one message element with the
2086 * new password (to set) and another one with the old password (to unset).
2087 *
2088 * The first which sets a password (new value) can have flags
2089 * (LDB_FLAG_MOD_ADD, LDB_FLAG_MOD_REPLACE) but also none (on "add" operations
2090 * for entries). The latter (old value) has always specified
2091 * LDB_FLAG_MOD_DELETE.
2092 *
2093 * Returns LDB_ERR_CONSTRAINT_VIOLATION and LDB_ERR_UNWILLING_TO_PERFORM if
2094 * matching message elements are malformed in respect to the set/change rules.
2095 * Otherwise it returns LDB_SUCCESS.
2096 */
2097 static int msg_find_old_and_new_pwd_val(const struct ldb_message *msg,
2098 const char *name,
2099 enum ldb_request_type operation,
2100 const struct ldb_val **new_val,
2101 const struct ldb_val **old_val)
2102 {
2103 unsigned int i;
2104
2105 *new_val = NULL;
2106 *old_val = NULL;
2107
2108 if (msg == NULL) {
2109 return LDB_SUCCESS;
2110 }
2111
2112 for (i = 0; i < msg->num_elements; i++) {
2113 if (ldb_attr_cmp(msg->elements[i].name, name) != 0) {
2114 continue;
2115 }
2116
2117 if ((operation == LDB_MODIFY) &&
2118 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE)) {
2119 /* 0 values are allowed */
2120 if (msg->elements[i].num_values == 1) {
2121 *old_val = &msg->elements[i].values[0];
2122 } else if (msg->elements[i].num_values > 1) {
2123 return LDB_ERR_CONSTRAINT_VIOLATION;
2124 }
2125 } else if ((operation == LDB_MODIFY) &&
2126 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_REPLACE)) {
2127 if (msg->elements[i].num_values > 0) {
2128 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2129 } else {
2130 return LDB_ERR_UNWILLING_TO_PERFORM;
2131 }
2132 } else {
2133 /* Add operations and LDB_FLAG_MOD_ADD */
2134 if (msg->elements[i].num_values > 0) {
2135 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2136 } else {
2137 return LDB_ERR_CONSTRAINT_VIOLATION;
2138 }
2139 }
2140 }
2141
2142 return LDB_SUCCESS;
2143 }
2144
2145 static int setup_io(struct ph_context *ac,
2146 const struct ldb_message *orig_msg,
2147 const struct ldb_message *searched_msg,
2148 struct setup_password_fields_io *io)
2149 {
2150 const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
2151 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2152 struct loadparm_context *lp_ctx =
2153 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2154 struct loadparm_context);
2155 int ret;
2156
2157 ZERO_STRUCTP(io);
2158
2159 /* Some operations below require kerberos contexts */
2160
2161 if (smb_krb5_init_context(ac,
2162 ldb_get_event_context(ldb),
2163 (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
2164 &io->smb_krb5_context) != 0) {
2165 return ldb_operr(ldb);
2166 }
2167
2168 io->ac = ac;
2169
2170 io->u.userAccountControl = ldb_msg_find_attr_as_uint(searched_msg,
2171 "userAccountControl", 0);
2172 io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
2173 io->u.sAMAccountName = ldb_msg_find_attr_as_string(searched_msg,
2174 "sAMAccountName", NULL);
2175 io->u.user_principal_name = ldb_msg_find_attr_as_string(searched_msg,
2176 "userPrincipalName", NULL);
2177 io->u.is_computer = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
2178
2179 if (io->u.sAMAccountName == NULL) {
2180 ldb_asprintf_errstring(ldb,
2181 "setup_io: sAMAccountName attribute is missing on %s for attempted password set/change",
2182 ldb_dn_get_linearized(searched_msg->dn));
2183
2184 return LDB_ERR_CONSTRAINT_VIOLATION;
2185 }
2186
2187 /* Only non-trust accounts have restrictions (possibly this test is the
2188 * wrong way around, but we like to be restrictive if possible */
2189 io->u.restrictions = !(io->u.userAccountControl
2190 & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
2191 | UF_SERVER_TRUST_ACCOUNT));
2192
2193 if (ac->userPassword) {
2194 ret = msg_find_old_and_new_pwd_val(orig_msg, "userPassword",
2195 ac->req->operation,
2196 &io->n.cleartext_utf8,
2197 &io->og.cleartext_utf8);
2198 if (ret != LDB_SUCCESS) {
2199 ldb_asprintf_errstring(ldb,
2200 "setup_io: "
2201 "it's only allowed to set the old password once!");
2202 return ret;
2203 }
2204 }
2205
2206 if (io->n.cleartext_utf8 != NULL) {
2207 struct ldb_val *cleartext_utf8_blob;
2208 char *p;
2209
2210 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
2211 if (!cleartext_utf8_blob) {
2212 return ldb_oom(ldb);
2213 }
2214
2215 *cleartext_utf8_blob = *io->n.cleartext_utf8;
2216
2217 /* make sure we have a null terminated string */
2218 p = talloc_strndup(cleartext_utf8_blob,
2219 (const char *)io->n.cleartext_utf8->data,
2220 io->n.cleartext_utf8->length);
2221 if ((p == NULL) && (io->n.cleartext_utf8->length > 0)) {
2222 return ldb_oom(ldb);
2223 }
2224 cleartext_utf8_blob->data = (uint8_t *)p;
2225
2226 io->n.cleartext_utf8 = cleartext_utf8_blob;
2227 }
2228
2229 ret = msg_find_old_and_new_pwd_val(orig_msg, "clearTextPassword",
2230 ac->req->operation,
2231 &io->n.cleartext_utf16,
2232 &io->og.cleartext_utf16);
2233 if (ret != LDB_SUCCESS) {
2234 ldb_asprintf_errstring(ldb,
2235 "setup_io: "
2236 "it's only allowed to set the old password once!");
2237 return ret;
2238 }
2239
2240 /* this rather strange looking piece of code is there to
2241 handle a ldap client setting a password remotely using the
2242 unicodePwd ldap field. The syntax is that the password is
2243 in UTF-16LE, with a " at either end. Unfortunately the
2244 unicodePwd field is also used to store the nt hashes
2245 internally in Samba, and is used in the nt hash format on
2246 the wire in DRS replication, so we have a single name for
2247 two distinct values. The code below leaves us with a small
2248 chance (less than 1 in 2^32) of a mixup, if someone manages
2249 to create a MD4 hash which starts and ends in 0x22 0x00, as
2250 that would then be treated as a UTF16 password rather than
2251 a nthash */
2252
2253 ret = msg_find_old_and_new_pwd_val(orig_msg, "unicodePwd",
2254 ac->req->operation,
2255 &quoted_utf16,
2256 &old_quoted_utf16);
2257 if (ret != LDB_SUCCESS) {
2258 ldb_asprintf_errstring(ldb,
2259 "setup_io: "
2260 "it's only allowed to set the old password once!");
2261 return ret;
2262 }
2263
2264 /* Checks and converts the actual "unicodePwd" attribute */
2265 if (!ac->hash_values &&
2266 quoted_utf16 &&
2267 quoted_utf16->length >= 4 &&
2268 quoted_utf16->data[0] == '"' &&
2269 quoted_utf16->data[1] == 0 &&
2270 quoted_utf16->data[quoted_utf16->length-2] == '"' &&
2271 quoted_utf16->data[quoted_utf16->length-1] == 0) {
2272 struct ldb_val *quoted_utf16_2;
2273
2274 if (io->n.cleartext_utf16) {
2275 /* refuse the change if someone wants to change with
2276 with both UTF16 possibilities at the same time... */
2277 ldb_asprintf_errstring(ldb,
2278 "setup_io: "
2279 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2280 return LDB_ERR_UNWILLING_TO_PERFORM;
2281 }
2282
2283 /*
2284 * adapt the quoted UTF16 string to be a real
2285 * cleartext one
2286 */
2287 quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2288 if (quoted_utf16_2 == NULL) {
2289 return ldb_oom(ldb);
2290 }
2291
2292 quoted_utf16_2->data = quoted_utf16->data + 2;
2293 quoted_utf16_2->length = quoted_utf16->length-4;
2294 io->n.cleartext_utf16 = quoted_utf16_2;
2295 io->n.nt_hash = NULL;
2296
2297 } else if (quoted_utf16) {
2298 /* We have only the hash available -> so no plaintext here */
2299 if (!ac->hash_values) {
2300 /* refuse the change if someone wants to change
2301 the hash without control specified... */
2302 ldb_asprintf_errstring(ldb,
2303 "setup_io: "
2304 "it's not allowed to set the NT hash password directly'");
2305 /* this looks odd but this is what Windows does:
2306 returns "UNWILLING_TO_PERFORM" on wrong
2307 password sets and "CONSTRAINT_VIOLATION" on
2308 wrong password changes. */
2309 if (old_quoted_utf16 == NULL) {
2310 return LDB_ERR_UNWILLING_TO_PERFORM;
2311 }
2312
2313 return LDB_ERR_CONSTRAINT_VIOLATION;
2314 }
2315
2316 io->n.nt_hash = talloc(io->ac, struct samr_Password);
2317 memcpy(io->n.nt_hash->hash, quoted_utf16->data,
2318 MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
2319 }
2320
2321 /* Checks and converts the previous "unicodePwd" attribute */
2322 if (!ac->hash_values &&
2323 old_quoted_utf16 &&
2324 old_quoted_utf16->length >= 4 &&
2325 old_quoted_utf16->data[0] == '"' &&
2326 old_quoted_utf16->data[1] == 0 &&
2327 old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
2328 old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
2329 struct ldb_val *old_quoted_utf16_2;
2330
2331 if (io->og.cleartext_utf16) {
2332 /* refuse the change if someone wants to change with
2333 both UTF16 possibilities at the same time... */
2334 ldb_asprintf_errstring(ldb,
2335 "setup_io: "
2336 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2337 return LDB_ERR_UNWILLING_TO_PERFORM;
2338 }
2339
2340 /*
2341 * adapt the quoted UTF16 string to be a real
2342 * cleartext one
2343 */
2344 old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2345 if (old_quoted_utf16_2 == NULL) {
2346 return ldb_oom(ldb);
2347 }
2348
2349 old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
2350 old_quoted_utf16_2->length = old_quoted_utf16->length-4;
2351
2352 io->og.cleartext_utf16 = old_quoted_utf16_2;
2353 io->og.nt_hash = NULL;
2354 } else if (old_quoted_utf16) {
2355 /* We have only the hash available -> so no plaintext here */
2356 if (!ac->hash_values) {
2357 /* refuse the change if someone wants to change
2358 the hash without control specified... */
2359 ldb_asprintf_errstring(ldb,
2360 "setup_io: "
2361 "it's not allowed to set the NT hash password directly'");
2362 return LDB_ERR_UNWILLING_TO_PERFORM;
2363 }
2364
2365 io->og.nt_hash = talloc(io->ac, struct samr_Password);
2366 memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
2367 MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
2368 }
2369
2370 /* Handles the "dBCSPwd" attribute (LM hash) */
2371 io->n.lm_hash = NULL; io->og.lm_hash = NULL;
2372 ret = msg_find_old_and_new_pwd_val(orig_msg, "dBCSPwd",
2373 ac->req->operation,
2374 &lm_hash, &old_lm_hash);
2375 if (ret != LDB_SUCCESS) {
2376 ldb_asprintf_errstring(ldb,
2377 "setup_io: "
2378 "it's only allowed to set the old password once!");
2379 return ret;
2380 }
2381
2382 if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
2383 /* refuse the change if someone wants to change the hash
2384 without control specified... */
2385 ldb_asprintf_errstring(ldb,
2386 "setup_io: "
2387 "it's not allowed to set the LM hash password directly'");
2388 return LDB_ERR_UNWILLING_TO_PERFORM;
2389 }
2390
2391 if (lpcfg_lanman_auth(lp_ctx) && (lm_hash != NULL)) {
2392 io->n.lm_hash = talloc(io->ac, struct samr_Password);
2393 memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
2394 sizeof(io->n.lm_hash->hash)));
2395 }
2396 if (lpcfg_lanman_auth(lp_ctx) && (old_lm_hash != NULL)) {
2397 io->og.lm_hash = talloc(io->ac, struct samr_Password);
2398 memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
2399 sizeof(io->og.lm_hash->hash)));
2400 }
2401
2402 /*
2403 * Handles the password change control if it's specified. It has the
2404 * precedance and overrides already specified old password values of
2405 * change requests (but that shouldn't happen since the control is
2406 * fully internal and only used in conjunction with replace requests!).
2407 */
2408 if (ac->change != NULL) {
2409 io->og.nt_hash = NULL;
2410 if (ac->change->old_nt_pwd_hash != NULL) {
2411 io->og.nt_hash = talloc_memdup(io->ac,
2412 ac->change->old_nt_pwd_hash,
2413 sizeof(struct samr_Password));
2414 }
2415 io->og.lm_hash = NULL;
2416 if (lpcfg_lanman_auth(lp_ctx) && (ac->change->old_lm_pwd_hash != NULL)) {
2417 io->og.lm_hash = talloc_memdup(io->ac,
2418 ac->change->old_lm_pwd_hash,
2419 sizeof(struct samr_Password));
2420 }
2421 }
2422
2423 /* refuse the change if someone wants to change the clear-
2424 text and supply his own hashes at the same time... */
2425 if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
2426 && (io->n.nt_hash || io->n.lm_hash)) {
2427 ldb_asprintf_errstring(ldb,
2428 "setup_io: "
2429 "it's only allowed to set the password in form of cleartext attributes or as hashes");
2430 return LDB_ERR_UNWILLING_TO_PERFORM;
2431 }
2432
2433 /* refuse the change if someone wants to change the password
2434 using both plaintext methods (UTF8 and UTF16) at the same time... */
2435 if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
2436 ldb_asprintf_errstring(ldb,
2437 "setup_io: "
2438 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2439 return LDB_ERR_UNWILLING_TO_PERFORM;
2440 }
2441
2442 /* refuse the change if someone tries to set/change the password by
2443 * the lanman hash alone and we've deactivated that mechanism. This
2444 * would end in an account without any password! */
2445 if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
2446 && (!io->n.nt_hash) && (!io->n.lm_hash)) {
2447 ldb_asprintf_errstring(ldb,
2448 "setup_io: "
2449 "It' not possible to delete the password (changes using the LAN Manager hash alone could be deactivated)!");
2450 /* on "userPassword" and "clearTextPassword" we've to return
2451 * something different, since these are virtual attributes */
2452 if ((ldb_msg_find_element(orig_msg, "userPassword") != NULL) ||
2453 (ldb_msg_find_element(orig_msg, "clearTextPassword") != NULL)) {
2454 return LDB_ERR_CONSTRAINT_VIOLATION;
2455 }
2456 return LDB_ERR_UNWILLING_TO_PERFORM;
2457 }
2458
2459 /* refuse the change if someone wants to compare against a plaintext
2460 or hash at the same time for a "password modify" operation... */
2461 if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
2462 && (io->og.nt_hash || io->og.lm_hash)) {
2463 ldb_asprintf_errstring(ldb,
2464 "setup_io: "
2465 "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
2466 return LDB_ERR_UNWILLING_TO_PERFORM;
2467 }
2468
2469 /* refuse the change if someone wants to compare against both
2470 * plaintexts at the same time for a "password modify" operation... */
2471 if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
2472 ldb_asprintf_errstring(ldb,
2473 "setup_io: "
2474 "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2475 return LDB_ERR_UNWILLING_TO_PERFORM;
2476 }
2477
2478 /* Decides if we have a password modify or password reset operation */
2479 if (ac->req->operation == LDB_ADD) {
2480 /* On "add" we have only "password reset" */
2481 ac->pwd_reset = true;
2482 } else if (ac->req->operation == LDB_MODIFY) {
2483 if (io->og.cleartext_utf8 || io->og.cleartext_utf16
2484 || io->og.nt_hash || io->og.lm_hash) {
2485 /* If we have an old password specified then for sure it
2486 * is a user "password change" */
2487 ac->pwd_reset = false;
2488 } else {
2489 /* Otherwise we have also here a "password reset" */
2490 ac->pwd_reset = true;
2491 }
2492 } else {
2493 /* this shouldn't happen */
2494 return ldb_operr(ldb);
2495 }
2496
2497 return LDB_SUCCESS;
2498 }
2499
2500 static struct ph_context *ph_init_context(struct ldb_module *module,
2501 struct ldb_request *req,
2502 bool userPassword)
2503 {
2504 struct ldb_context *ldb;
2505 struct ph_context *ac;
2506
2507 ldb = ldb_module_get_ctx(module);
2508
2509 ac = talloc_zero(req, struct ph_context);
2510 if (ac == NULL) {
2511 ldb_set_errstring(ldb, "Out of Memory");
2512 return NULL;
2513 }
2514
2515 ac->module = module;
2516 ac->req = req;
2517 ac->userPassword = userPassword;
2518
2519 return ac;
2520 }
2521
2522 static void ph_apply_controls(struct ph_context *ac)
2523 {
2524 struct ldb_control *ctrl;
2525
2526 ac->change_status = false;
2527 ctrl = ldb_request_get_control(ac->req,
2528 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
2529 if (ctrl != NULL) {
2530 ac->change_status = true;
2531
2532 /* Mark the "change status" control as uncritical (done) */
2533 ctrl->critical = false;
2534 }
2535
2536 ac->hash_values = false;
2537 ctrl = ldb_request_get_control(ac->req,
2538 DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
2539 if (ctrl != NULL) {
2540 ac->hash_values = true;
2541
2542 /* Mark the "hash values" control as uncritical (done) */
2543 ctrl->critical = false;
2544 }
2545
2546 ctrl = ldb_request_get_control(ac->req,
2547 DSDB_CONTROL_PASSWORD_CHANGE_OID);
2548 if (ctrl != NULL) {
2549 ac->change = (struct dsdb_control_password_change *) ctrl->data;
2550
2551 /* Mark the "change" control as uncritical (done) */
2552 ctrl->critical = false;
2553 }
2554
2555 ac->pwd_last_set_bypass = false;
2556 ctrl = ldb_request_get_control(ac->req,
2557 DSDB_CONTROL_PASSWORD_BYPASS_LAST_SET_OID);
2558 if (ctrl != NULL) {
2559 ac->pwd_last_set_bypass = true;
2560
2561 /* Mark the "bypass pwdLastSet" control as uncritical (done) */
2562 ctrl->critical = false;
2563 }
2564 }
2565
2566 static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
2567 {
2568 struct ph_context *ac;
2569
2570 ac = talloc_get_type(req->context, struct ph_context);
2571
2572 if (!ares) {
2573 return ldb_module_done(ac->req, NULL, NULL,
2574 LDB_ERR_OPERATIONS_ERROR);
2575 }
2576
2577 if (ares->type == LDB_REPLY_REFERRAL) {
2578 return ldb_module_send_referral(ac->req, ares->referral);
2579 }
2580
2581 if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2582 /* On success and trivial errors a status control is being
2583 * added (used for example by the "samdb_set_password" call) */
2584 ldb_reply_add_control(ares,
2585 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2586 false,
2587 ac->status);
2588 }
2589
2590 if (ares->error != LDB_SUCCESS) {
2591 return ldb_module_done(ac->req, ares->controls,
2592 ares->response, ares->error);
2593 }
2594
2595 if (ares->type != LDB_REPLY_DONE) {
2596 talloc_free(ares);
2597 return ldb_module_done(ac->req, NULL, NULL,
2598 LDB_ERR_OPERATIONS_ERROR);
2599 }
2600
2601 return ldb_module_done(ac->req, ares->controls,
2602 ares->response, ares->error);
2603 }
2604
2605 static int password_hash_add_do_add(struct ph_context *ac);
2606 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares);
2607 static int password_hash_mod_search_self(struct ph_context *ac);
2608 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares);
2609 static int password_hash_mod_do_mod(struct ph_context *ac);
2610
2611 static int get_domain_data_callback(struct ldb_request *req,
2612 struct ldb_reply *ares)
2613 {
2614 struct ldb_context *ldb;
2615 struct ph_context *ac;
2616 struct loadparm_context *lp_ctx;
2617 int ret;
2618
2619 ac = talloc_get_type(req->context, struct ph_context);
2620 ldb = ldb_module_get_ctx(ac->module);
2621
2622 if (!ares) {
2623 ret = LDB_ERR_OPERATIONS_ERROR;
2624 goto done;
2625 }
2626 if (ares->error != LDB_SUCCESS) {
2627 return ldb_module_done(ac->req, ares->controls,
2628 ares->response, ares->error);
2629 }
2630
2631 switch (ares->type) {
2632 case LDB_REPLY_ENTRY:
2633 if (ac->status != NULL) {
2634 talloc_free(ares);
2635
2636 ldb_set_errstring(ldb, "Too many results");
2637 ret = LDB_ERR_OPERATIONS_ERROR;
2638 goto done;
2639 }
2640
2641 /* Setup the "status" structure (used as control later) */
2642 ac->status = talloc_zero(ac->req,
2643 struct dsdb_control_password_change_status);
2644 if (ac->status == NULL) {
2645 talloc_free(ares);
2646
2647 ldb_oom(ldb);
2648 ret = LDB_ERR_OPERATIONS_ERROR;
2649 goto done;
2650 }
2651
2652 /* Setup the "domain data" structure */
2653 ac->status->domain_data.pwdProperties =
2654 ldb_msg_find_attr_as_uint(ares->message, "pwdProperties", -1);
2655 ac->status->domain_data.pwdHistoryLength =
2656 ldb_msg_find_attr_as_uint(ares->message, "pwdHistoryLength", -1);
2657 ac->status->domain_data.maxPwdAge =
2658 ldb_msg_find_attr_as_int64(ares->message, "maxPwdAge", -1);
2659 ac->status->domain_data.minPwdAge =
2660 ldb_msg_find_attr_as_int64(ares->message, "minPwdAge", -1);
2661 ac->status->domain_data.minPwdLength =
2662 ldb_msg_find_attr_as_uint(ares->message, "minPwdLength", -1);
2663 ac->status->domain_data.store_cleartext =
2664 ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
2665
2666 talloc_free(ares);
2667
2668 /* For a domain DN, this puts things in dotted notation */
2669 /* For builtin domains, this will give details for the host,
2670 * but that doesn't really matter, as it's just used for salt
2671 * and kerberos principals, which don't exist here */
2672
2673 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2674 struct loadparm_context);
2675
2676 ac->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
2677 ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
2678 ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
2679
2680 ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
2681
2682 ret = LDB_SUCCESS;
2683 break;
2684
2685 case LDB_REPLY_REFERRAL:
2686 /* ignore */
2687 talloc_free(ares);
2688 ret = LDB_SUCCESS;
2689 break;
2690
2691 case LDB_REPLY_DONE:
2692 talloc_free(ares);
2693 /* call the next step */
2694 switch (ac->req->operation) {
2695 case LDB_ADD:
2696 ret = password_hash_add_do_add(ac);
2697 break;
2698
2699 case LDB_MODIFY:
2700 ret = password_hash_mod_do_mod(ac);
2701 break;
2702
2703 default:
2704 ret = LDB_ERR_OPERATIONS_ERROR;
2705 break;
2706 }
2707 break;
2708 }
2709
2710 done:
2711 if (ret != LDB_SUCCESS) {
2712 struct ldb_reply *new_ares;
2713
2714 new_ares = talloc_zero(ac->req, struct ldb_reply);
2715 if (new_ares == NULL) {
2716 ldb_oom(ldb);
2717 return ldb_module_done(ac->req, NULL, NULL,
2718 LDB_ERR_OPERATIONS_ERROR);
2719 }
2720
2721 new_ares->error = ret;
2722 if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2723 /* On success and trivial errors a status control is being
2724 * added (used for example by the "samdb_set_password" call) */
2725 ldb_reply_add_control(new_ares,
2726 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2727 false,
2728 ac->status);
2729 }
2730
2731 return ldb_module_done(ac->req, new_ares->controls,
2732 new_ares->response, new_ares->error);
2733 }
2734
2735 return LDB_SUCCESS;
2736 }
2737
2738 static int build_domain_data_request(struct ph_context *ac)
2739 {
2740 /* attrs[] is returned from this function in
2741 ac->dom_req->op.search.attrs, so it must be static, as
2742 otherwise the compiler can put it on the stack */
2743 struct ldb_context *ldb;
2744 static const char * const attrs[] = { "pwdProperties",
2745 "pwdHistoryLength",
2746 "maxPwdAge",
2747 "minPwdAge",
2748 "minPwdLength",
2749 NULL };
2750 int ret;
2751
2752 ldb = ldb_module_get_ctx(ac->module);
2753
2754 ret = ldb_build_search_req(&ac->dom_req, ldb, ac,
2755 ldb_get_default_basedn(ldb),
2756 LDB_SCOPE_BASE,
2757 NULL, attrs,
2758 NULL,
2759 ac, get_domain_data_callback,
2760 ac->req);
2761 LDB_REQ_SET_LOCATION(ac->dom_req);
2762 return ret;
2763 }
2764
2765 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
2766 {
2767 struct ldb_context *ldb;
2768 struct ph_context *ac;
2769 struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
2770 *ntAttr, *lmAttr;
2771 int ret;
2772 struct ldb_control *bypass = NULL;
2773 bool userPassword = dsdb_user_password_support(module, req, req);
2774
2775 ldb = ldb_module_get_ctx(module);
2776
2777 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
2778
2779 if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
2780 return ldb_next_request(module, req);
2781 }
2782
2783 bypass = ldb_request_get_control(req,
2784 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2785 if (bypass != NULL) {
2786 /* Mark the "bypass" control as uncritical (done) */
2787 bypass->critical = false;
2788 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
2789 return password_hash_bypass(module, req);
2790 }
2791
2792 /* nobody must touch password histories and 'supplementalCredentials' */
2793 if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
2794 return LDB_ERR_UNWILLING_TO_PERFORM;
2795 }
2796 if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
2797 return LDB_ERR_UNWILLING_TO_PERFORM;
2798 }
2799 if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
2800 return LDB_ERR_UNWILLING_TO_PERFORM;
2801 }
2802
2803 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2804 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
2805
2806 userPasswordAttr = NULL;
2807 if (userPassword) {
2808 userPasswordAttr = ldb_msg_find_element(req->op.add.message,
2809 "userPassword");
2810 /* MS-ADTS 3.1.1.3.1.5.2 */
2811 if ((userPasswordAttr != NULL) &&
2812 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2813 return LDB_ERR_CONSTRAINT_VIOLATION;
2814 }
2815 }
2816 clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
2817 ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
2818 lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
2819
2820 if ((!userPasswordAttr) && (!clearTextPasswordAttr) && (!ntAttr) && (!lmAttr)) {
2821 return ldb_next_request(module, req);
2822 }
2823
2824 /* Make sure we are performing the password set action on a (for us)
2825 * valid object. Those are instances of either "user" and/or
2826 * "inetOrgPerson". Otherwise continue with the submodules. */
2827 if ((!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "user"))
2828 && (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "inetOrgPerson"))) {
2829
2830 if (ldb_msg_find_element(req->op.add.message, "clearTextPassword") != NULL) {
2831 ldb_set_errstring(ldb,
2832 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2833 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2834 }
2835
2836 return ldb_next_request(module, req);
2837 }
2838
2839 ac = ph_init_context(module, req, userPassword);
2840 if (ac == NULL) {
2841 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2842 return ldb_operr(ldb);
2843 }
2844 ph_apply_controls(ac);
2845
2846 /* get user domain data */
2847 ret = build_domain_data_request(ac);
2848 if (ret != LDB_SUCCESS) {
2849 return ret;
2850 }
2851
2852 return ldb_next_request(module, ac->dom_req);
2853 }
2854
2855 static int password_hash_add_do_add(struct ph_context *ac)
2856 {
2857 struct ldb_context *ldb;
2858 struct ldb_request *down_req;
2859 struct ldb_message *msg;
2860 struct setup_password_fields_io io;
2861 int ret;
2862
2863 /* Prepare the internal data structure containing the passwords */
2864 ret = setup_io(ac, ac->req->op.add.message, ac->req->op.add.message, &io);
2865 if (ret != LDB_SUCCESS) {
2866 return ret;
2867 }
2868
2869 ldb = ldb_module_get_ctx(ac->module);
2870
2871 msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
2872 if (msg == NULL) {
2873 return ldb_operr(ldb);
2874 }
2875
2876 /* remove attributes that we just read into 'io' */
2877 if (ac->userPassword) {
2878 ldb_msg_remove_attr(msg, "userPassword");
2879 }
2880 ldb_msg_remove_attr(msg, "clearTextPassword");
2881 ldb_msg_remove_attr(msg, "unicodePwd");
2882 ldb_msg_remove_attr(msg, "dBCSPwd");
2883 ldb_msg_remove_attr(msg, "pwdLastSet");
2884
2885 ret = setup_password_fields(&io);
2886 if (ret != LDB_SUCCESS) {
2887 return ret;
2888 }
2889
2890 ret = check_password_restrictions(&io);
2891 if (ret != LDB_SUCCESS) {
2892 return ret;
2893 }
2894
2895 if (io.g.nt_hash) {
2896 ret = samdb_msg_add_hash(ldb, ac, msg,
2897 "unicodePwd", io.g.nt_hash);
2898 if (ret != LDB_SUCCESS) {
2899 return ret;
2900 }
2901 }
2902 if (io.g.lm_hash) {
2903 ret = samdb_msg_add_hash(ldb, ac, msg,
2904 "dBCSPwd", io.g.lm_hash);
2905 if (ret != LDB_SUCCESS) {
2906 return ret;
2907 }
2908 }
2909 if (io.g.nt_history_len > 0) {
2910 ret = samdb_msg_add_hashes(ldb, ac, msg,
2911 "ntPwdHistory",
2912 io.g.nt_history,
2913 io.g.nt_history_len);
2914 if (ret != LDB_SUCCESS) {
2915 return ret;
2916 }
2917 }
2918 if (io.g.lm_history_len > 0) {
2919 ret = samdb_msg_add_hashes(ldb, ac, msg,
2920 "lmPwdHistory",
2921 io.g.lm_history,
2922 io.g.lm_history_len);
2923 if (ret != LDB_SUCCESS) {
2924 return ret;
2925 }
2926 }
2927 if (io.g.supplemental.length > 0) {
2928 ret = ldb_msg_add_value(msg, "supplementalCredentials",
2929 &io.g.supplemental, NULL);
2930 if (ret != LDB_SUCCESS) {
2931 return ret;
2932 }
2933 }
2934 ret = samdb_msg_add_uint64(ldb, ac, msg,
2935 "pwdLastSet",
2936 io.g.last_set);
2937 if (ret != LDB_SUCCESS) {
2938 return ret;
2939 }
2940
2941 ret = ldb_build_add_req(&down_req, ldb, ac,
2942 msg,
2943 ac->req->controls,
2944 ac, ph_op_callback,
2945 ac->req);
2946 LDB_REQ_SET_LOCATION(down_req);
2947 if (ret != LDB_SUCCESS) {
2948 return ret;
2949 }
2950
2951 return ldb_next_request(ac->module, down_req);
2952 }
2953
2954 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
2955 {
2956 struct ldb_context *ldb;
2957 struct ph_context *ac;
2958 const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
2959 "unicodePwd", "dBCSPwd", NULL }, **l;
2960 unsigned int attr_cnt, del_attr_cnt, add_attr_cnt, rep_attr_cnt;
2961 struct ldb_message_element *passwordAttr;
2962 struct ldb_message *msg;
2963 struct ldb_request *down_req;
2964 int ret;
2965 struct ldb_control *bypass = NULL;
2966 bool userPassword = dsdb_user_password_support(module, req, req);
2967
2968 ldb = ldb_module_get_ctx(module);
2969
2970 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
2971
2972 if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
2973 return ldb_next_request(module, req);
2974 }
2975
2976 bypass = ldb_request_get_control(req,
2977 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2978 if (bypass != NULL) {
2979 /* Mark the "bypass" control as uncritical (done) */
2980 bypass->critical = false;
2981 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
2982 return password_hash_bypass(module, req);
2983 }
2984
2985 /* nobody must touch password histories and 'supplementalCredentials' */
2986 if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
2987 return LDB_ERR_UNWILLING_TO_PERFORM;
2988 }
2989 if (ldb_msg_find_element(req->op.mod.message, "lmPwdHistory")) {
2990 return LDB_ERR_UNWILLING_TO_PERFORM;
2991 }
2992 if (ldb_msg_find_element(req->op.mod.message, "supplementalCredentials")) {
2993 return LDB_ERR_UNWILLING_TO_PERFORM;
2994 }
2995
2996 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2997 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes.
2998 * For password changes/set there should be a 'delete' or a 'modify'
2999 * on these attributes. */
3000 attr_cnt = 0;
3001 for (l = passwordAttrs; *l != NULL; l++) {
3002 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
3003 continue;
3004 }
3005
3006 if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
3007 /* MS-ADTS 3.1.1.3.1.5.2 */
3008 if ((ldb_attr_cmp(*l, "userPassword") == 0) &&
3009 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
3010 return LDB_ERR_CONSTRAINT_VIOLATION;
3011 }
3012
3013 ++attr_cnt;
3014 }
3015 }
3016 if (attr_cnt == 0) {
3017 return ldb_next_request(module, req);
3018 }
3019
3020 ac = ph_init_context(module, req, userPassword);
3021 if (!ac) {
3022 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
3023 return ldb_operr(ldb);
3024 }
3025 ph_apply_controls(ac);
3026
3027 /* use a new message structure so that we can modify it */
3028 msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
3029 if (msg == NULL) {
3030 return ldb_oom(ldb);
3031 }
3032
3033 /* - check for single-valued password attributes
3034 * (if not return "CONSTRAINT_VIOLATION")
3035 * - check that for a password change operation one add and one delete
3036 * operation exists
3037 * (if not return "CONSTRAINT_VIOLATION" or "UNWILLING_TO_PERFORM")
3038 * - check that a password change and a password set operation cannot
3039 * be mixed
3040 * (if not return "UNWILLING_TO_PERFORM")
3041 * - remove all password attributes modifications from the first change
3042 * operation (anything without the passwords) - we will make the real
3043 * modification later */
3044 del_attr_cnt = 0;
3045 add_attr_cnt = 0;
3046 rep_attr_cnt = 0;
3047 for (l = passwordAttrs; *l != NULL; l++) {
3048 if ((!ac->userPassword) &&
3049 (ldb_attr_cmp(*l, "userPassword") == 0)) {
3050 continue;
3051 }
3052
3053 while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
3054 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE) {
3055 ++del_attr_cnt;
3056 }
3057 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD) {
3058 ++add_attr_cnt;
3059 }
3060 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_REPLACE) {
3061 ++rep_attr_cnt;
3062 }
3063 if ((passwordAttr->num_values != 1) &&
3064 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD)) {
3065 talloc_free(ac);
3066 ldb_asprintf_errstring(ldb,
3067 "'%s' attribute must have exactly one value on add operations!",
3068 *l);
3069 return LDB_ERR_CONSTRAINT_VIOLATION;
3070 }
3071 if ((passwordAttr->num_values > 1) &&
3072 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE)) {
3073 talloc_free(ac);
3074 ldb_asprintf_errstring(ldb,
3075 "'%s' attribute must have zero or one value(s) on delete operations!",
3076 *l);
3077 return LDB_ERR_CONSTRAINT_VIOLATION;
3078 }
3079 ldb_msg_remove_element(msg, passwordAttr);
3080 }
3081 }
3082 if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
3083 talloc_free(ac);
3084 ldb_set_errstring(ldb,
3085 "Only the add action for a password change specified!");
3086 return LDB_ERR_UNWILLING_TO_PERFORM;
3087 }
3088 if ((del_attr_cnt > 1) || (add_attr_cnt > 1)) {
3089 talloc_free(ac);
3090 ldb_set_errstring(ldb,
3091 "Only one delete and one add action for a password change allowed!");
3092 return LDB_ERR_UNWILLING_TO_PERFORM;
3093 }
3094 if ((rep_attr_cnt > 0) && ((del_attr_cnt > 0) || (add_attr_cnt > 0))) {
3095 talloc_free(ac);
3096 ldb_set_errstring(ldb,
3097 "Either a password change or a password set operation is allowed!");
3098 return LDB_ERR_UNWILLING_TO_PERFORM;
3099 }
3100
3101 /* if there was nothing else to be modified skip to next step */
3102 if (msg->num_elements == 0) {
3103 return password_hash_mod_search_self(ac);
3104 }
3105
3106 ret = ldb_build_mod_req(&down_req, ldb, ac,
3107 msg,
3108 req->controls,
3109 ac, ph_modify_callback,
3110 req);
3111 LDB_REQ_SET_LOCATION(down_req);
3112 if (ret != LDB_SUCCESS) {
3113 return ret;
3114 }
3115
3116 return ldb_next_request(module, down_req);
3117 }
3118
3119 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
3120 {
3121 struct ph_context *ac;
3122
3123 ac = talloc_get_type(req->context, struct ph_context);
3124
3125 if (!ares) {
3126 return ldb_module_done(ac->req, NULL, NULL,
3127 LDB_ERR_OPERATIONS_ERROR);
3128 }
3129
3130 if (ares->type == LDB_REPLY_REFERRAL) {
3131 return ldb_module_send_referral(ac->req, ares->referral);
3132 }
3133
3134 if (ares->error != LDB_SUCCESS) {
3135 return ldb_module_done(ac->req, ares->controls,
3136 ares->response, ares->error);
3137 }
3138
3139 if (ares->type != LDB_REPLY_DONE) {
3140 talloc_free(ares);
3141 return ldb_module_done(ac->req, NULL, NULL,
3142 LDB_ERR_OPERATIONS_ERROR);
3143 }
3144
3145 talloc_free(ares);
3146
3147 return password_hash_mod_search_self(ac);
3148 }
3149
3150 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
3151 {
3152 struct ldb_context *ldb;
3153 struct ph_context *ac;
3154 int ret;
3155
3156 ac = talloc_get_type(req->context, struct ph_context);
3157 ldb = ldb_module_get_ctx(ac->module);
3158
3159 if (!ares) {
3160 ret = LDB_ERR_OPERATIONS_ERROR;
3161 goto done;
3162 }
3163 if (ares->error != LDB_SUCCESS) {
3164 return ldb_module_done(ac->req, ares->controls,
3165 ares->response, ares->error);
3166 }
3167
3168 /* we are interested only in the single reply (base search) */
3169 switch (ares->type) {
3170 case LDB_REPLY_ENTRY:
3171 /* Make sure we are performing the password change action on a
3172 * (for us) valid object. Those are instances of either "user"
3173 * and/or "inetOrgPerson". Otherwise continue with the
3174 * submodules. */
3175 if ((!ldb_msg_check_string_attribute(ares->message, "objectClass", "user"))
3176 && (!ldb_msg_check_string_attribute(ares->message, "objectClass", "inetOrgPerson"))) {
3177 talloc_free(ares);
3178
3179 if (ldb_msg_find_element(ac->req->op.mod.message, "clearTextPassword") != NULL) {
3180 ldb_set_errstring(ldb,
3181 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
3182 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
3183 goto done;
3184 }
3185
3186 ret = ldb_next_request(ac->module, ac->req);
3187 goto done;
3188 }
3189
3190 if (ac->search_res != NULL) {
3191 talloc_free(ares);
3192
3193 ldb_set_errstring(ldb, "Too many results");
3194 ret = LDB_ERR_OPERATIONS_ERROR;
3195 goto done;
3196 }
3197
3198 ac->search_res = talloc_steal(ac, ares);
3199 ret = LDB_SUCCESS;
3200 break;
3201
3202 case LDB_REPLY_REFERRAL:
3203 /* ignore anything else for now */
3204 talloc_free(ares);
3205 ret = LDB_SUCCESS;
3206 break;
3207
3208 case LDB_REPLY_DONE:
3209 talloc_free(ares);
3210
3211 /* get user domain data */
3212 ret = build_domain_data_request(ac);
3213 if (ret != LDB_SUCCESS) {
3214 return ldb_module_done(ac->req, NULL, NULL, ret);
3215 }
3216
3217 ret = ldb_next_request(ac->module, ac->dom_req);
3218 break;
3219 }
3220
3221 done:
3222 if (ret != LDB_SUCCESS) {
3223 return ldb_module_done(ac->req, NULL, NULL, ret);
3224 }
3225
3226 return LDB_SUCCESS;
3227 }
3228
3229 static int password_hash_mod_search_self(struct ph_context *ac)
3230 {
3231 struct ldb_context *ldb;
3232 static const char * const attrs[] = { "objectClass",
3233 "userAccountControl",
3234 "pwdLastSet",
3235 "sAMAccountName",
3236 "objectSid",
3237 "userPrincipalName",
3238 "supplementalCredentials",
3239 "lmPwdHistory",
3240 "ntPwdHistory",
3241 "dBCSPwd",
3242 "unicodePwd",
3243 NULL };
3244 struct ldb_request *search_req;
3245 int ret;
3246
3247 ldb = ldb_module_get_ctx(ac->module);
3248
3249 ret = ldb_build_search_req(&search_req, ldb, ac,
3250 ac->req->op.mod.message->dn,
3251 LDB_SCOPE_BASE,
3252 "(objectclass=*)",
3253 attrs,
3254 NULL,
3255 ac, ph_mod_search_callback,
3256 ac->req);
3257 LDB_REQ_SET_LOCATION(search_req);
3258 if (ret != LDB_SUCCESS) {
3259 return ret;
3260 }
3261
3262 return ldb_next_request(ac->module, search_req);
3263 }
3264
3265 static int password_hash_mod_do_mod(struct ph_context *ac)
3266 {
3267 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3268 struct loadparm_context *lp_ctx =
3269 talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
3270 struct loadparm_context);
3271 struct ldb_request *mod_req;
3272 struct ldb_message *msg;
3273 const struct ldb_message *orig_msg, *searched_msg;
3274 struct setup_password_fields_io io;
3275 int ret;
3276 NTSTATUS status;
3277
3278 /* use a new message structure so that we can modify it */
3279 msg = ldb_msg_new(ac);
3280 if (msg == NULL) {
3281 return ldb_operr(ldb);
3282 }
3283
3284 /* modify dn */
3285 msg->dn = ac->req->op.mod.message->dn;
3286
3287 orig_msg = ac->req->op.mod.message;
3288 searched_msg = ac->search_res->message;
3289
3290 /* Prepare the internal data structure containing the passwords */
3291 ret = setup_io(ac, orig_msg, searched_msg, &io);
3292 if (ret != LDB_SUCCESS) {
3293 return ret;
3294 }
3295
3296 /* Get the old password from the database */
3297 status = samdb_result_passwords(io.ac,
3298 lp_ctx,
3299 discard_const_p(struct ldb_message, searched_msg),
3300 &io.o.lm_hash, &io.o.nt_hash);
3301 if (!NT_STATUS_IS_OK(status)) {
3302 return ldb_operr(ldb);
3303 }
3304
3305 io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
3306 io.o.lm_history_len = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
3307 io.o.supplemental = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
3308
3309 ret = setup_password_fields(&io);
3310 if (ret != LDB_SUCCESS) {
3311 return ret;
3312 }
3313
3314 ret = check_password_restrictions(&io);
3315 if (ret != LDB_SUCCESS) {
3316 return ret;
3317 }
3318
3319 /* make sure we replace all the old attributes */
3320 ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
3321 ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
3322 ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3323 ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3324 ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
3325 ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
3326
3327 if (io.g.nt_hash) {
3328 ret = samdb_msg_add_hash(ldb, ac, msg,
3329 "unicodePwd", io.g.nt_hash);
3330 if (ret != LDB_SUCCESS) {
3331 return ret;
3332 }
3333 }
3334 if (io.g.lm_hash) {
3335 ret = samdb_msg_add_hash(ldb, ac, msg,
3336 "dBCSPwd", io.g.lm_hash);
3337 if (ret != LDB_SUCCESS) {
3338 return ret;
3339 }
3340 }
3341 if (io.g.nt_history_len > 0) {
3342 ret = samdb_msg_add_hashes(ldb, ac, msg,
3343 "ntPwdHistory",
3344 io.g.nt_history,
3345 io.g.nt_history_len);
3346 if (ret != LDB_SUCCESS) {
3347 return ret;
3348 }
3349 }
3350 if (io.g.lm_history_len > 0) {
3351 ret = samdb_msg_add_hashes(ldb, ac, msg,
3352 "lmPwdHistory",
3353 io.g.lm_history,
3354 io.g.lm_history_len);
3355 if (ret != LDB_SUCCESS) {
3356 return ret;
3357 }
3358 }
3359 if (io.g.supplemental.length > 0) {
3360 ret = ldb_msg_add_value(msg, "supplementalCredentials",
3361 &io.g.supplemental, NULL);
3362 if (ret != LDB_SUCCESS) {
3363 return ret;
3364 }
3365 }
3366 ret = samdb_msg_add_uint64(ldb, ac, msg,
3367 "pwdLastSet",
3368 io.g.last_set);
3369 if (ret != LDB_SUCCESS) {
3370 return ret;
3371 }
3372
3373 ret = ldb_build_mod_req(&mod_req, ldb, ac,
3374 msg,
3375 ac->req->controls,
3376 ac, ph_op_callback,
3377 ac->req);
3378 LDB_REQ_SET_LOCATION(mod_req);
3379 if (ret != LDB_SUCCESS) {
3380 return ret;
3381 }
3382
3383 return ldb_next_request(ac->module, mod_req);
3384 }
3385
3386 static const struct ldb_module_ops ldb_password_hash_module_ops = {
3387 .name = "password_hash",
3388 .add = password_hash_add,
3389 .modify = password_hash_modify
3390 };
3391
3392 int ldb_password_hash_module_init(const char *version)
3393 {
3394 LDB_MODULE_CHECK_VERSION(version);
3395 return ldb_register_module(&ldb_password_hash_module_ops);
3396 }
reg import